31364531 has 6 divisors (see below), whose sum is σ = 34475196. Its totient is φ = 28513100.

The previous prime is 31364521. The next prime is 31364533. The reversal of 31364531 is 13546313.

It is a de Polignac number, because none of the positive numbers 2^k-31364531 is a prime.

It is a super-2 number, since 2×31364531² = 1967467609699922, 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 31364531.

It is not an unprimeable number, because it can be changed into a prime (31364533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129485 + ... + 129726.

It is an arithmetic number, because the mean of its divisors is an integer number (5745866).

Almost surely, 2^31364531 is an apocalyptic number.

31364531 is a deficient number, since it is larger than the sum of its proper divisors (3110665).

31364531 is a wasteful number, since it uses less digits than its factorization.

31364531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259233 (or 259222 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 31364531 is about 5600.4045389597. The cubic root of 31364531 is about 315.3645933796.

It can be divided in two parts, 3136 and 4531, that added together give a palindrome (7667).

The spelling of 31364531 in words is "thirty-one million, three hundred sixty-four thousand, five hundred thirty-one".