56329681 has 2 divisors, whose sum is σ = 56329682. Its totient is φ = 56329680.

The previous prime is 56329667. The next prime is 56329711. The reversal of 56329681 is 18692365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 3549456 = 7265^2 + 1884^2 .

It is a cyclic number.

It is not a de Polignac number, because 56329681 - 2¹¹ = 56327633 is a prime.

It is a super-2 number, since 2×56329681² = 6346065923123522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56329181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28164840 + 28164841.

It is an arithmetic number, because the mean of its divisors is an integer number (28164841).

Almost surely, 2^56329681 is an apocalyptic number.

It is an amenable number.

56329681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56329681 is an equidigital number, since it uses as much as digits as its factorization.

56329681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 56329681 is about 7505.3101867944. The cubic root of 56329681 is about 383.3355502497.

The spelling of 56329681 in words is "fifty-six million, three hundred twenty-nine thousand, six hundred eighty-one".