1215799055 has 8 divisors (see below), whose sum is σ = 1490000832. Its totient is φ = 951944608.

The previous prime is 1215799043. The next prime is 1215799097. The reversal of 1215799055 is 5509975121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215799055 - 2¹² = 1215794959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215798997 and 1215799015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2586572 + ... + 2587041.

It is an arithmetic number, because the mean of its divisors is an integer number (186250104).

Almost surely, 2^1215799055 is an apocalyptic number.

1215799055 is a deficient number, since it is larger than the sum of its proper divisors (274201777).

1215799055 is an equidigital number, since it uses as much as digits as its factorization.

1215799055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173665.

The product of its (nonzero) digits is 141750, while the sum is 44.

The square root of 1215799055 is about 34868.3101827433. The cubic root of 1215799055 is about 1067.3018621743.

The spelling of 1215799055 in words is "one billion, two hundred fifteen million, seven hundred ninety-nine thousand, fifty-five".