115212511555 has 8 divisors (see below), whose sum is σ = 138287638944. Its totient is φ = 92148259200.

The previous prime is 115212511541. The next prime is 115212511573. The reversal of 115212511555 is 555115212511.

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

It is not a de Polignac number, because 115212511555 - 2³⁵ = 80852773187 is a prime.

It is a super-2 number, since 2×115212511555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115212511555.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2695431 + ... + 2737840.

It is an arithmetic number, because the mean of its divisors is an integer number (17285954868).

Almost surely, 2^115212511555 is an apocalyptic number.

115212511555 is a deficient number, since it is larger than the sum of its proper divisors (23075127389).

115212511555 is an equidigital number, since it uses as much as digits as its factorization.

115212511555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437517.

The product of its digits is 12500, while the sum is 34.

The spelling of 115212511555 in words is "one hundred fifteen billion, two hundred twelve million, five hundred eleven thousand, five hundred fifty-five".