30521075957 has 2 divisors, whose sum is σ = 30521075958. Its totient is φ = 30521075956.

The previous prime is 30521075929. The next prime is 30521075989. The reversal of 30521075957 is 75957012503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16993990321 + 13527085636 = 130361^2 + 116306^2 .

It is a cyclic number.

It is not a de Polignac number, because 30521075957 - 2⁸ = 30521075701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30521075917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260537978 + 15260537979.

It is an arithmetic number, because the mean of its divisors is an integer number (15260537979).

Almost surely, 2^30521075957 is an apocalyptic number.

It is an amenable number.

30521075957 is a deficient number, since it is larger than the sum of its proper divisors (1).

30521075957 is an equidigital number, since it uses as much as digits as its factorization.

30521075957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 330750, while the sum is 44.

The spelling of 30521075957 in words is "thirty billion, five hundred twenty-one million, seventy-five thousand, nine hundred fifty-seven".