115631122257 has 48 divisors (see below), whose sum is σ = 202176479232. Its totient is φ = 62168186880.

The previous prime is 115631122249. The next prime is 115631122261. The reversal of 115631122257 is 752221136511.

115631122257 is a `hidden beast` number, since 1 + 1 + 5 + 631 + 12 + 2 + 2 + 5 + 7 = 666.

It is not a de Polignac number, because 115631122257 - 2³ = 115631122249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115631122207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3686832 + ... + 3718062.

It is an arithmetic number, because the mean of its divisors is an integer number (4212009984).

Almost surely, 2^115631122257 is an apocalyptic number.

115631122257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

115631122257 is a deficient number, since it is larger than the sum of its proper divisors (86545356975).

115631122257 is a wasteful number, since it uses less digits than its factorization.

115631122257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34718 (or 34715 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

Adding to 115631122257 its reverse (752221136511), we get a palindrome (867852258768).

The spelling of 115631122257 in words is "one hundred fifteen billion, six hundred thirty-one million, one hundred twenty-two thousand, two hundred fifty-seven".