31552057 has 2 divisors, whose sum is σ = 31552058. Its totient is φ = 31552056.

The previous prime is 31552049. The next prime is 31552069. The reversal of 31552057 is 75025513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31147561 + 404496 = 5581^2 + 636^2 .

It is a cyclic number.

It is not a de Polignac number, because 31552057 - 2³ = 31552049 is a prime.

It is not a weakly prime, because it can be changed into another prime (31558057) 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 as a sum of consecutive naturals, namely, 15776028 + 15776029.

It is an arithmetic number, because the mean of its divisors is an integer number (15776029).

Almost surely, 2^31552057 is an apocalyptic number.

It is an amenable number.

31552057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31552057 is an equidigital number, since it uses as much as digits as its factorization.

31552057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 31552057 is about 5617.1217718686. The cubic root of 31552057 is about 315.9918580661.

The spelling of 31552057 in words is "thirty-one million, five hundred fifty-two thousand, fifty-seven".