31021304057 has 2 divisors, whose sum is σ = 31021304058. Its totient is φ = 31021304056.

The previous prime is 31021303997. The next prime is 31021304063. The reversal of 31021304057 is 75040312013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16122904576 + 14898399481 = 126976^2 + 122059^2 .

It is a cyclic number.

It is not a de Polignac number, because 31021304057 - 2²⁰ = 31020255481 is a prime.

It is not a weakly prime, because it can be changed into another prime (31021304357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510652028 + 15510652029.

It is an arithmetic number, because the mean of its divisors is an integer number (15510652029).

Almost surely, 2^31021304057 is an apocalyptic number.

It is an amenable number.

31021304057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31021304057 is an equidigital number, since it uses as much as digits as its factorization.

31021304057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The spelling of 31021304057 in words is "thirty-one billion, twenty-one million, three hundred four thousand, fifty-seven".