113239431 has 16 divisors (see below), whose sum is σ = 177631200. Its totient is φ = 71051904.

The previous prime is 113239387. The next prime is 113239433. The reversal of 113239431 is 134932311.

It is not a de Polignac number, because 113239431 - 2⁶ = 113239367 is a prime.

It is a super-2 number, since 2×113239431² = 25646337466407522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 113239395 and 113239404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113239433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122896 + ... + 123813.

It is an arithmetic number, because the mean of its divisors is an integer number (11101950).

Almost surely, 2^113239431 is an apocalyptic number.

113239431 is a deficient number, since it is larger than the sum of its proper divisors (64391769).

113239431 is a wasteful number, since it uses less digits than its factorization.

113239431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246735 (or 246729 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 113239431 is about 10641.4017403724. The cubic root of 113239431 is about 483.8000320826.

The spelling of 113239431 in words is "one hundred thirteen million, two hundred thirty-nine thousand, four hundred thirty-one".