56059721 has 2 divisors, whose sum is σ = 56059722. Its totient is φ = 56059720.

The previous prime is 56059651. The next prime is 56059769. The reversal of 56059721 is 12795065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55294096 + 765625 = 7436^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 56059721 - 2²² = 51865417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56059321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28029860 + 28029861.

It is an arithmetic number, because the mean of its divisors is an integer number (28029861).

Almost surely, 2^56059721 is an apocalyptic number.

It is an amenable number.

56059721 is a deficient number, since it is larger than the sum of its proper divisors (1).

56059721 is an equidigital number, since it uses as much as digits as its factorization.

56059721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 56059721 is about 7487.3039874176. The cubic root of 56059721 is about 382.7221908118.

The spelling of 56059721 in words is "fifty-six million, fifty-nine thousand, seven hundred twenty-one".