115354431531 has 8 divisors (see below), whose sum is σ = 170895454160. Its totient is φ = 76902954336.

The previous prime is 115354431523. The next prime is 115354431547. The reversal of 115354431531 is 135134453511.

115354431531 is a `hidden beast` number, since 1 + 1 + 53 + 5 + 44 + 31 + 531 = 666.

It is not a de Polignac number, because 115354431531 - 2³ = 115354431523 is a prime.

It is a super-2 number, since 2×115354431531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115354431571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2136193150 + ... + 2136193203.

It is an arithmetic number, because the mean of its divisors is an integer number (21361931770).

Almost surely, 2^115354431531 is an apocalyptic number.

115354431531 is a deficient number, since it is larger than the sum of its proper divisors (55541022629).

115354431531 is an equidigital number, since it uses as much as digits as its factorization.

115354431531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4272386362 (or 4272386356 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 115354431531 in words is "one hundred fifteen billion, three hundred fifty-four million, four hundred thirty-one thousand, five hundred thirty-one".