56943521 has 2 divisors, whose sum is σ = 56943522. Its totient is φ = 56943520.

The previous prime is 56943517. The next prime is 56943533. The reversal of 56943521 is 12534965.

56943521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40500496 + 16443025 = 6364^2 + 4055^2 .

It is a cyclic number.

It is not a de Polignac number, because 56943521 - 2² = 56943517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56943511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28471760 + 28471761.

It is an arithmetic number, because the mean of its divisors is an integer number (28471761).

Almost surely, 2^56943521 is an apocalyptic number.

It is an amenable number.

56943521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56943521 is an equidigital number, since it uses as much as digits as its factorization.

56943521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 56943521 is about 7546.0930951056. The cubic root of 56943521 is about 384.7229603055.

The spelling of 56943521 in words is "fifty-six million, nine hundred forty-three thousand, five hundred twenty-one".