31020057 has 16 divisors (see below), whose sum is σ = 47439360. Its totient is φ = 20012400.

The previous prime is 31020007. The next prime is 31020079. The reversal of 31020057 is 75002013.

It is not a de Polignac number, because 31020057 - 2⁶ = 31019993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31020007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17694 + ... + 19367.

It is an arithmetic number, because the mean of its divisors is an integer number (2964960).

Almost surely, 2^31020057 is an apocalyptic number.

It is an amenable number.

31020057 is a deficient number, since it is larger than the sum of its proper divisors (16419303).

31020057 is a wasteful number, since it uses less digits than its factorization.

31020057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37101 (or 37095 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 31020057 is about 5569.5652433561. The cubic root of 31020057 is about 314.2057997426.

The spelling of 31020057 in words is "thirty-one million, twenty thousand, fifty-seven".