115512215511 has 64 divisors (see below), whose sum is σ = 196226334720. Its totient is φ = 58693541760.

The previous prime is 115512215509. The next prime is 115512215513.

115512215511 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (115512215509) and next prime (115512215513).

It is not a de Polignac number, because 115512215511 - 2¹ = 115512215509 is a prime.

It is a super-2 number, since 2×115512215511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115512215513) 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 63 ways as a sum of consecutive naturals, for example, 33296685 + ... + 33300153.

It is an arithmetic number, because the mean of its divisors is an integer number (3066036480).

Almost surely, 2^115512215511 is an apocalyptic number.

115512215511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115512215511 is a deficient number, since it is larger than the sum of its proper divisors (80714119209).

115512215511 is a wasteful number, since it uses less digits than its factorization.

115512215511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6604.

The product of its digits is 2500, while the sum is 30.

The spelling of 115512215511 in words is "one hundred fifteen billion, five hundred twelve million, two hundred fifteen thousand, five hundred eleven".