56496721 has 2 divisors, whose sum is σ = 56496722. Its totient is φ = 56496720.

The previous prime is 56496707. The next prime is 56496731. The reversal of 56496721 is 12769465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 5588496 = 7135^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 56496721 - 2¹¹ = 56494673 is a prime.

It is not a weakly prime, because it can be changed into another prime (56496701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28248360 + 28248361.

It is an arithmetic number, because the mean of its divisors is an integer number (28248361).

Almost surely, 2^56496721 is an apocalyptic number.

It is an amenable number.

56496721 is a deficient number, since it is larger than the sum of its proper divisors (1).

56496721 is an equidigital number, since it uses as much as digits as its factorization.

56496721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 56496721 is about 7516.4300701862. The cubic root of 56496721 is about 383.7140906533.

The spelling of 56496721 in words is "fifty-six million, four hundred ninety-six thousand, seven hundred twenty-one".