15115212057 has 16 divisors (see below), whose sum is σ = 23279044032. Its totient is φ = 8621867520.

The previous prime is 15115212053. The next prime is 15115212067. The reversal of 15115212057 is 75021251151.

It is not a de Polignac number, because 15115212057 - 2² = 15115212053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15115212053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13471108 + ... + 13472229.

It is an arithmetic number, because the mean of its divisors is an integer number (1454940252).

Almost surely, 2^15115212057 is an apocalyptic number.

15115212057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15115212057 is a deficient number, since it is larger than the sum of its proper divisors (8163831975).

15115212057 is a wasteful number, since it uses less digits than its factorization.

15115212057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26943368.

The product of its (nonzero) digits is 3500, while the sum is 30.

The spelling of 15115212057 in words is "fifteen billion, one hundred fifteen million, two hundred twelve thousand, fifty-seven".