31663057 has 2 divisors, whose sum is σ = 31663058. Its totient is φ = 31663056.

The previous prime is 31663013. The next prime is 31663081. The reversal of 31663057 is 75036613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 3530641 = 5304^2 + 1879^2 .

It is a cyclic number.

It is not a de Polignac number, because 31663057 - 2⁷ = 31662929 is a prime.

It is not a weakly prime, because it can be changed into another prime (31663097) 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, 15831528 + 15831529.

It is an arithmetic number, because the mean of its divisors is an integer number (15831529).

Almost surely, 2^31663057 is an apocalyptic number.

It is an amenable number.

31663057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663057 is an equidigital number, since it uses as much as digits as its factorization.

31663057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 31663057 is about 5626.9936022711. The cubic root of 31663057 is about 316.3619770423.

The spelling of 31663057 in words is "thirty-one million, six hundred sixty-three thousand, fifty-seven".