56204423221 has 8 divisors (see below), whose sum is σ = 56451742488. Its totient is φ = 55957440000.

The previous prime is 56204423213. The next prime is 56204423227. The reversal of 56204423221 is 12232440265.

It can be written as a sum of positive squares in 4 ways, for example, as 301022500 + 55903400721 = 17350^2 + 236439^2 .

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 56204423221 - 2³ = 56204423213 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 (56204423227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254211 + ... + 420751.

It is an arithmetic number, because the mean of its divisors is an integer number (7056467811).

Almost surely, 2^56204423221 is an apocalyptic number.

It is an amenable number.

56204423221 is a deficient number, since it is larger than the sum of its proper divisors (247319267).

56204423221 is a wasteful number, since it uses less digits than its factorization.

56204423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168023.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 56204423221 its reverse (12232440265), we get a palindrome (68436863486).

The spelling of 56204423221 in words is "fifty-six billion, two hundred four million, four hundred twenty-three thousand, two hundred twenty-one".