56005081 has 4 divisors (see below), whose sum is σ = 61096464. Its totient is φ = 50913700.

The previous prime is 56005063. The next prime is 56005129. The reversal of 56005081 is 18050065.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56005081 is a prime.

It is a super-2 number, since 2×56005081² = 6273138195633122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56005031) 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, 2545675 + ... + 2545696.

It is an arithmetic number, because the mean of its divisors is an integer number (15274116).

Almost surely, 2^56005081 is an apocalyptic number.

It is an amenable number.

56005081 is a deficient number, since it is larger than the sum of its proper divisors (5091383).

56005081 is a wasteful number, since it uses less digits than its factorization.

56005081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091382.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 56005081 is about 7483.6542544401. The cubic root of 56005081 is about 382.5978071609.

The spelling of 56005081 in words is "fifty-six million, five thousand, eighty-one".