56621073 has 4 divisors (see below), whose sum is σ = 75494768. Its totient is φ = 37747380.

The previous prime is 56621069. The next prime is 56621077. The reversal of 56621073 is 37012665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (56621069) and next prime (56621077).

It is not a de Polignac number, because 56621073 - 2² = 56621069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56621073.

It is not an unprimeable number, because it can be changed into a prime (56621077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9436843 + ... + 9436848.

It is an arithmetic number, because the mean of its divisors is an integer number (18873692).

Almost surely, 2^56621073 is an apocalyptic number.

It is an amenable number.

56621073 is a deficient number, since it is larger than the sum of its proper divisors (18873695).

56621073 is a wasteful number, since it uses less digits than its factorization.

56621073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18873694.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 56621073 is about 7524.6975354495. The cubic root of 56621073 is about 383.9954087450.

The spelling of 56621073 in words is "fifty-six million, six hundred twenty-one thousand, seventy-three".