56647881 has 12 divisors (see below), whose sum is σ = 84464640. Its totient is φ = 36546840.

The previous prime is 56647861. The next prime is 56647901. The reversal of 56647881 is 18874665.

It is a happy number.

56647881 is a `hidden beast` number, since 566 + 4 + 7 + 8 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (56647861) and next prime (56647901).

It is not a de Polignac number, because 56647881 - 2⁷ = 56647753 is a prime.

It is a super-2 number, since 2×56647881² = 6417964843580322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56647841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101241 + ... + 101798.

It is an arithmetic number, because the mean of its divisors is an integer number (7038720).

Almost surely, 2^56647881 is an apocalyptic number.

It is an amenable number.

56647881 is a deficient number, since it is larger than the sum of its proper divisors (27816759).

56647881 is a wasteful number, since it uses less digits than its factorization.

56647881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203076 (or 203073 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 56647881 is about 7526.4786587089. The cubic root of 56647881 is about 384.0560017608.

The spelling of 56647881 in words is "fifty-six million, six hundred forty-seven thousand, eight hundred eighty-one".