56731667 has 4 divisors (see below), whose sum is σ = 56752080. Its totient is φ = 56711256.

The previous prime is 56731657. The next prime is 56731673. The reversal of 56731667 is 76613765.

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

It is a cyclic number.

It is not a de Polignac number, because 56731667 - 2⁴ = 56731651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56731607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5228 + ... + 11865.

It is an arithmetic number, because the mean of its divisors is an integer number (14188020).

Almost surely, 2^56731667 is an apocalyptic number.

56731667 is a deficient number, since it is larger than the sum of its proper divisors (20413).

56731667 is a wasteful number, since it uses less digits than its factorization.

56731667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20412.

The product of its digits is 158760, while the sum is 41.

The square root of 56731667 is about 7532.0426844250. The cubic root of 56731667 is about 384.2452566449.

The spelling of 56731667 in words is "fifty-six million, seven hundred thirty-one thousand, six hundred sixty-seven".