56392081 has 4 divisors (see below), whose sum is σ = 56570292. Its totient is φ = 56213872.

The previous prime is 56392073. The next prime is 56392087. The reversal of 56392081 is 18029365.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6548481 + 49843600 = 2559^2 + 7060^2 .

It is a cyclic number.

It is not a de Polignac number, because 56392081 - 2³ = 56392073 is a prime.

It is a super-2 number, since 2×56392081² = 6360133599021122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56392087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88630 + ... + 89263.

It is an arithmetic number, because the mean of its divisors is an integer number (14142573).

Almost surely, 2^56392081 is an apocalyptic number.

It is an amenable number.

56392081 is a deficient number, since it is larger than the sum of its proper divisors (178211).

56392081 is a wasteful number, since it uses less digits than its factorization.

56392081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178210.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 56392081 is about 7509.4660928724. The cubic root of 56392081 is about 383.4770464717.

It can be divided in two parts, 563920 and 81, that added together give a square (564001 = 751²).

The spelling of 56392081 in words is "fifty-six million, three hundred ninety-two thousand, eighty-one".