31322113 has 4 divisors (see below), whose sum is σ = 32683968. Its totient is φ = 29960260.

The previous prime is 31322111. The next prime is 31322119. The reversal of 31322113 is 31122313.

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: 31122313 = 1061 ⋅29333.

It is not a de Polignac number, because 31322113 - 2¹ = 31322111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31322111) 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, 680893 + ... + 680938.

It is an arithmetic number, because the mean of its divisors is an integer number (8170992).

Almost surely, 2^31322113 is an apocalyptic number.

It is an amenable number.

31322113 is a deficient number, since it is larger than the sum of its proper divisors (1361855).

31322113 is a wasteful number, since it uses less digits than its factorization.

31322113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361854.

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

The square root of 31322113 is about 5596.6162098182. The cubic root of 31322113 is about 315.2223608435. Note that the first 3 decimals are identical.

Adding to 31322113 its reverse (31122313), we get a palindrome (62444426).

The spelling of 31322113 in words is "thirty-one million, three hundred twenty-two thousand, one hundred thirteen".