56420081 has 8 divisors (see below), whose sum is σ = 59045760. Its totient is φ = 53808832.

The previous prime is 56420057. The next prime is 56420083. The reversal of 56420081 is 18002465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56420081 - 2²² = 52225777 is a prime.

It is a super-2 number, since 2×56420081² = 6366451080093122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56420081.

It is not an unprimeable number, because it can be changed into a prime (56420083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4841 + ... + 11673.

It is an arithmetic number, because the mean of its divisors is an integer number (7380720).

Almost surely, 2^56420081 is an apocalyptic number.

It is an amenable number.

56420081 is a deficient number, since it is larger than the sum of its proper divisors (2625679).

56420081 is a wasteful number, since it uses less digits than its factorization.

56420081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 56420081 is about 7511.3301751421. The cubic root of 56420081 is about 383.5405044401.

The spelling of 56420081 in words is "fifty-six million, four hundred twenty thousand, eighty-one".