56036621 has 4 divisors (see below), whose sum is σ = 56249952. Its totient is φ = 55823292.

The previous prime is 56036593. The next prime is 56036633. The reversal of 56036621 is 12663065.

56036621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 56036621 - 2¹⁰ = 56035597 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 (56036021) 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 3 ways as a sum of consecutive naturals, for example, 106271 + ... + 106796.

It is an arithmetic number, because the mean of its divisors is an integer number (14062488).

Almost surely, 2^56036621 is an apocalyptic number.

It is an amenable number.

56036621 is a deficient number, since it is larger than the sum of its proper divisors (213331).

56036621 is a wasteful number, since it uses less digits than its factorization.

56036621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213330.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56036621 is about 7485.7612171375. The cubic root of 56036621 is about 382.6696153497.

Adding to 56036621 its reverse (12663065), we get a palindrome (68699686).

The spelling of 56036621 in words is "fifty-six million, thirty-six thousand, six hundred twenty-one".