113031431 has 4 divisors (see below), whose sum is σ = 113076600. Its totient is φ = 112986264.

The previous prime is 113031409. The next prime is 113031467. The reversal of 113031431 is 134130311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113031431 - 2⁶ = 113031367 is a prime.

It is a super-2 number, since 2×113031431² = 25552208787815522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113031031) 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, 18596 + ... + 23913.

It is an arithmetic number, because the mean of its divisors is an integer number (28269150).

Almost surely, 2^113031431 is an apocalyptic number.

113031431 is a deficient number, since it is larger than the sum of its proper divisors (45169).

113031431 is an equidigital number, since it uses as much as digits as its factorization.

113031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45168.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 113031431 is about 10631.6240998260. The cubic root of 113031431 is about 483.5036333167.

Adding to 113031431 its reverse (134130311), we get a palindrome (247161742).

The spelling of 113031431 in words is "one hundred thirteen million, thirty-one thousand, four hundred thirty-one".