31232113 has 4 divisors (see below), whose sum is σ = 34071408. Its totient is φ = 28392820.

The previous prime is 31232087. The next prime is 31232141. The reversal of 31232113 is 31123213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31123213 = 11 ⋅2829383.

It is a cyclic number.

It is not a de Polignac number, because 31232113 - 2⁵ = 31232081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31236113) 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, 1419631 + ... + 1419652.

It is an arithmetic number, because the mean of its divisors is an integer number (8517852).

Almost surely, 2^31232113 is an apocalyptic number.

It is an amenable number.

31232113 is a deficient number, since it is larger than the sum of its proper divisors (2839295).

31232113 is a wasteful number, since it uses less digits than its factorization.

31232113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839294.

The product of its digits is 108, while the sum is 16.

The square root of 31232113 is about 5588.5698528335. The cubic root of 31232113 is about 314.9201544498.

Adding to 31232113 its reverse (31123213), we get a palindrome (62355326).

Subtracting from 31232113 its reverse (31123213), we obtain a square (108900 = 330²).

The spelling of 31232113 in words is "thirty-one million, two hundred thirty-two thousand, one hundred thirteen".