56755621 has 8 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 52248432.

The previous prime is 56755613. The next prime is 56755631. The reversal of 56755621 is 12655765.

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 56755621 - 2³ = 56755613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56755631) 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 7 ways as a sum of consecutive naturals, for example, 721 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (7660800).

Almost surely, 2^56755621 is an apocalyptic number.

It is an amenable number.

56755621 is a deficient number, since it is larger than the sum of its proper divisors (4530779).

56755621 is a wasteful number, since it uses less digits than its factorization.

56755621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11795.

The product of its digits is 63000, while the sum is 37.

The square root of 56755621 is about 7533.6326562954. The cubic root of 56755621 is about 384.2993294184.

The spelling of 56755621 in words is "fifty-six million, seven hundred fifty-five thousand, six hundred twenty-one".