115723531 has 32 divisors (see below), whose sum is σ = 149713920. Its totient is φ = 86832000.

The previous prime is 115723523. The next prime is 115723537. The reversal of 115723531 is 135327511.

It is a cyclic number.

It is not a de Polignac number, because 115723531 - 2³ = 115723523 is a prime.

It is a super-2 number, since 2×115723531² = 26783871254215922, which 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 115723531.

It is not an unprimeable number, because it can be changed into a prime (115723537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430065 + ... + 430333.

It is an arithmetic number, because the mean of its divisors is an integer number (4678560).

Almost surely, 2^115723531 is an apocalyptic number.

115723531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115723531 is a deficient number, since it is larger than the sum of its proper divisors (33990389).

115723531 is a wasteful number, since it uses less digits than its factorization.

115723531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

The product of its digits is 3150, while the sum is 28.

The square root of 115723531 is about 10757.4872065924. The cubic root of 115723531 is about 487.3121341430.

The spelling of 115723531 in words is "one hundred fifteen million, seven hundred twenty-three thousand, five hundred thirty-one".