56438621 has 4 divisors (see below), whose sum is σ = 56648700. Its totient is φ = 56228544.

The previous prime is 56438617. The next prime is 56438651. The reversal of 56438621 is 12683465.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23145721 + 33292900 = 4811^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 56438621 - 2² = 56438617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56438651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104636 + ... + 105173.

It is an arithmetic number, because the mean of its divisors is an integer number (14162175).

Almost surely, 2^56438621 is an apocalyptic number.

It is an amenable number.

56438621 is a deficient number, since it is larger than the sum of its proper divisors (210079).

56438621 is a wasteful number, since it uses less digits than its factorization.

56438621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210078.

The product of its digits is 34560, while the sum is 35.

The square root of 56438621 is about 7512.5642093762. The cubic root of 56438621 is about 383.5825111280.

The spelling of 56438621 in words is "fifty-six million, four hundred thirty-eight thousand, six hundred twenty-one".