53031521857 has 2 divisors, whose sum is σ = 53031521858. Its totient is φ = 53031521856.

The previous prime is 53031521849. The next prime is 53031521899. The reversal of 53031521857 is 75812513035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47443809856 + 5587712001 = 217816^2 + 74751^2 .

It is a cyclic number.

It is not a de Polignac number, because 53031521857 - 2³ = 53031521849 is a prime.

It is not a weakly prime, because it can be changed into another prime (53031521957) 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, 26515760928 + 26515760929.

It is an arithmetic number, because the mean of its divisors is an integer number (26515760929).

Almost surely, 2^53031521857 is an apocalyptic number.

It is an amenable number.

53031521857 is a deficient number, since it is larger than the sum of its proper divisors (1).

53031521857 is an equidigital number, since it uses as much as digits as its factorization.

53031521857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 53031521857 in words is "fifty-three billion, thirty-one million, five hundred twenty-one thousand, eight hundred fifty-seven".