31085272 has 16 divisors (see below), whose sum is σ = 58357800. Its totient is φ = 15523200.

The previous prime is 31085251. The next prime is 31085279. The reversal of 31085272 is 27258013.

It is a self number, because there is not a number n which added to its sum of digits gives 31085272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31085279) 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, 6147 + ... + 9997.

Almost surely, 2^31085272 is an apocalyptic number.

It is an amenable number.

31085272 is a deficient number, since it is larger than the sum of its proper divisors (27272528).

31085272 is a wasteful number, since it uses less digits than its factorization.

31085272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866 (or 4862 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 31085272 is about 5575.4167557233. The cubic root of 31085272 is about 314.4258357479.

The spelling of 31085272 in words is "thirty-one million, eighty-five thousand, two hundred seventy-two".