get_the_category_by_ID()

get_the_category_by_ID( int $cat_id ): string|WP_Error

function get_the_category_by_ID( $cat_id ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
	$cat_id   = (int) $cat_id;
	$category = get_term( $cat_id );

	if ( is_wp_error( $category ) ) {
		return $category;
	}

	return ( $category ) ? $category->name : '';
}