56937521 has 2 divisors, whose sum is σ = 56937522. Its totient is φ = 56937520.

The previous prime is 56937499. The next prime is 56937523. The reversal of 56937521 is 12573965.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 5456896 = 7175^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 56937521 - 2⁶ = 56937457 is a prime.

Together with 56937523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56937523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28468760 + 28468761.

It is an arithmetic number, because the mean of its divisors is an integer number (28468761).

Almost surely, 2^56937521 is an apocalyptic number.

It is an amenable number.

56937521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56937521 is an equidigital number, since it uses as much as digits as its factorization.

56937521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 56937521 is about 7545.6955279152. The cubic root of 56937521 is about 384.7094473908.

The spelling of 56937521 in words is "fifty-six million, nine hundred thirty-seven thousand, five hundred twenty-one".