115215511155 has 32 divisors (see below), whose sum is σ = 185235240960. Its totient is φ = 61151658240.

The previous prime is 115215511141. The next prime is 115215511193. The reversal of 115215511155 is 551115512511.

It is not a de Polignac number, because 115215511155 - 2⁴ = 115215511139 is a prime.

It is a super-2 number, since 2×115215511155² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16992556 + ... + 16999334.

It is an arithmetic number, because the mean of its divisors is an integer number (5788601280).

Almost surely, 2^115215511155 is an apocalyptic number.

115215511155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115215511155 is a deficient number, since it is larger than the sum of its proper divisors (70019729805).

115215511155 is a wasteful number, since it uses less digits than its factorization.

115215511155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12091.

The product of its digits is 6250, while the sum is 33.

The spelling of 115215511155 in words is "one hundred fifteen billion, two hundred fifteen million, five hundred eleven thousand, one hundred fifty-five".