31396516 has 12 divisors (see below), whose sum is σ = 55173580. Its totient is φ = 15632640.

The previous prime is 31396513. The next prime is 31396537. The reversal of 31396516 is 61569313.

It can be written as a sum of positive squares in 2 ways, for example, as 28047616 + 3348900 = 5296^2 + 1830^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31396513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15321 + ... + 17248.

Almost surely, 2^31396516 is an apocalyptic number.

It is an amenable number.

31396516 is a deficient number, since it is larger than the sum of its proper divisors (23777064).

31396516 is a wasteful number, since it uses less digits than its factorization.

31396516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32814 (or 32812 counting only the distinct ones).

The product of its digits is 14580, while the sum is 34.

The square root of 31396516 is about 5603.2594085943. The cubic root of 31396516 is about 315.4717580580.

The spelling of 31396516 in words is "thirty-one million, three hundred ninety-six thousand, five hundred sixteen".