56363221 has 4 divisors (see below), whose sum is σ = 57426732. Its totient is φ = 55299712.

The previous prime is 56363201. The next prime is 56363257. The reversal of 56363221 is 12236365.

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 25959025 + 30404196 = 5095^2 + 5514^2 .

It is a cyclic number.

It is not a de Polignac number, because 56363221 - 2¹⁵ = 56330453 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 56363221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56363201) 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, 531676 + ... + 531781.

It is an arithmetic number, because the mean of its divisors is an integer number (14356683).

Almost surely, 2^56363221 is an apocalyptic number.

It is an amenable number.

56363221 is a deficient number, since it is larger than the sum of its proper divisors (1063511).

56363221 is a wasteful number, since it uses less digits than its factorization.

56363221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063510.

The product of its digits is 6480, while the sum is 28.

The square root of 56363221 is about 7507.5442722637. The cubic root of 56363221 is about 383.4116174501.

Adding to 56363221 its reverse (12236365), we get a palindrome (68599586).

The spelling of 56363221 in words is "fifty-six million, three hundred sixty-three thousand, two hundred twenty-one".