31000057 has 8 divisors (see below), whose sum is σ = 33882912. Its totient is φ = 28128000.

The previous prime is 31000003. The next prime is 31000063. The reversal of 31000057 is 75000013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31000057 is a prime.

It is a super-2 number, since 2×31000057² = 1922007068006498, 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 31000057.

It is not an unprimeable number, because it can be changed into a prime (31000087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4057 + ... + 8857.

It is an arithmetic number, because the mean of its divisors is an integer number (4235364).

Almost surely, 2^31000057 is an apocalyptic number.

It is an amenable number.

31000057 is a deficient number, since it is larger than the sum of its proper divisors (2882855).

31000057 is a wasteful number, since it uses less digits than its factorization.

31000057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399.

The product of its (nonzero) digits is 105, while the sum is 16.

The square root of 31000057 is about 5567.7694815788. The cubic root of 31000057 is about 314.1382577753.

The spelling of 31000057 in words is "thirty-one million, fifty-seven", and thus it is an aban number and an uban number.