56649731 has 8 divisors (see below), whose sum is σ = 58687200. Its totient is φ = 54617920.

The previous prime is 56649727. The next prime is 56649743. The reversal of 56649731 is 13794665.

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 56649731 - 2² = 56649727 is a prime.

It is a super-2 number, since 2×56649731² = 6418384044744722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56649751) 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, 37511 + ... + 38991.

It is an arithmetic number, because the mean of its divisors is an integer number (7335900).

Almost surely, 2^56649731 is an apocalyptic number.

56649731 is a deficient number, since it is larger than the sum of its proper divisors (2037469).

56649731 is a wasteful number, since it uses less digits than its factorization.

56649731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829.

The product of its digits is 136080, while the sum is 41.

The square root of 56649731 is about 7526.6015571438. The cubic root of 56649731 is about 384.0601825342.

The spelling of 56649731 in words is "fifty-six million, six hundred forty-nine thousand, seven hundred thirty-one".