56658921 has 8 divisors (see below), whose sum is σ = 82413024. Its totient is φ = 34338720.

The previous prime is 56658911. The next prime is 56658929. The reversal of 56658921 is 12985665.

56658921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56658921 - 2⁶ = 56658857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56658929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858436 + ... + 858501.

It is an arithmetic number, because the mean of its divisors is an integer number (10301628).

Almost surely, 2^56658921 is an apocalyptic number.

It is an amenable number.

56658921 is a deficient number, since it is larger than the sum of its proper divisors (25754103).

56658921 is a wasteful number, since it uses less digits than its factorization.

56658921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716951.

The product of its digits is 129600, while the sum is 42.

The square root of 56658921 is about 7527.2120336815. The cubic root of 56658921 is about 384.0809494598.

The spelling of 56658921 in words is "fifty-six million, six hundred fifty-eight thousand, nine hundred twenty-one".