56815983 has 12 divisors (see below), whose sum is σ = 93791568. Its totient is φ = 32466240.

The previous prime is 56815951. The next prime is 56815987. The reversal of 56815983 is 38951865.

56815983 is a `hidden beast` number, since 56 + 8 + 1 + 598 + 3 = 666.

It is not a de Polignac number, because 56815983 - 2⁵ = 56815951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56815987) 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, 450858 + ... + 450983.

It is an arithmetic number, because the mean of its divisors is an integer number (7815964).

Almost surely, 2^56815983 is an apocalyptic number.

56815983 is a deficient number, since it is larger than the sum of its proper divisors (36975585).

56815983 is a wasteful number, since it uses less digits than its factorization.

56815983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901854 (or 901851 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 56815983 is about 7537.6377599351. The cubic root of 56815983 is about 384.4355206707.

It can be divided in two parts, 5681 and 5983, that added together give a square (11664 = 108²).

The spelling of 56815983 in words is "fifty-six million, eight hundred fifteen thousand, nine hundred eighty-three".