31013057 has 2 divisors, whose sum is σ = 31013058. Its totient is φ = 31013056.

The previous prime is 31013053. The next prime is 31013063. The reversal of 31013057 is 75031013.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27206656 + 3806401 = 5216^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013057 - 2² = 31013053 is a prime.

It is not a weakly prime, because it can be changed into another prime (31013053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506528 + 15506529.

It is an arithmetic number, because the mean of its divisors is an integer number (15506529).

Almost surely, 2^31013057 is an apocalyptic number.

It is an amenable number.

31013057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013057 is an equidigital number, since it uses as much as digits as its factorization.

31013057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 31013057 is about 5568.9367926023. The cubic root of 31013057 is about 314.1821633572.

The spelling of 31013057 in words is "thirty-one million, thirteen thousand, fifty-seven".