57533521 has 2 divisors, whose sum is σ = 57533522. Its totient is φ = 57533520.

The previous prime is 57533507. The next prime is 57533543. The reversal of 57533521 is 12533575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 1296 = 7585^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 57533521 - 2⁷ = 57533393 is a prime.

It is not a weakly prime, because it can be changed into another prime (57533591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28766760 + 28766761.

It is an arithmetic number, because the mean of its divisors is an integer number (28766761).

Almost surely, 2^57533521 is an apocalyptic number.

It is an amenable number.

57533521 is a deficient number, since it is larger than the sum of its proper divisors (1).

57533521 is an equidigital number, since it uses as much as digits as its factorization.

57533521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 31.

The square root of 57533521 is about 7585.0854312921. The cubic root of 57533521 is about 386.0471207923.

The spelling of 57533521 in words is "fifty-seven million, five hundred thirty-three thousand, five hundred twenty-one".