113931431 has 4 divisors (see below), whose sum is σ = 116355552. Its totient is φ = 111507312.

The previous prime is 113931413. The next prime is 113931437. The reversal of 113931431 is 134139311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134139311 = 2339 ⋅57349.

It is not a de Polignac number, because 113931431 - 2¹⁰ = 113930407 is a prime.

It is a super-2 number, since 2×113931431² = 25960741939415522, 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 113931431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113931437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211990 + ... + 1212083.

It is an arithmetic number, because the mean of its divisors is an integer number (29088888).

Almost surely, 2^113931431 is an apocalyptic number.

113931431 is a deficient number, since it is larger than the sum of its proper divisors (2424121).

113931431 is an equidigital number, since it uses as much as digits as its factorization.

113931431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424120.

The product of its digits is 972, while the sum is 26.

The square root of 113931431 is about 10673.8667314146. The cubic root of 113931431 is about 484.7835233297.

The spelling of 113931431 in words is "one hundred thirteen million, nine hundred thirty-one thousand, four hundred thirty-one".