56722226221 has 4 divisors (see below), whose sum is σ = 57652098844. Its totient is φ = 55792353600.

The previous prime is 56722226203. The next prime is 56722226233. The reversal of 56722226221 is 12262222765.

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 4571652996 + 52150573225 = 67614^2 + 228365^2 .

It is a cyclic number.

It is not a de Polignac number, because 56722226221 - 2⁹ = 56722225709 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 (56722226021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464936220 + ... + 464936341.

It is an arithmetic number, because the mean of its divisors is an integer number (14413024711).

Almost surely, 2^56722226221 is an apocalyptic number.

It is an amenable number.

56722226221 is a deficient number, since it is larger than the sum of its proper divisors (929872623).

56722226221 is an equidigital number, since it uses as much as digits as its factorization.

56722226221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929872622.

The product of its digits is 80640, while the sum is 37.

Adding to 56722226221 its reverse (12262222765), we get a palindrome (68984448986).

The spelling of 56722226221 in words is "fifty-six billion, seven hundred twenty-two million, two hundred twenty-six thousand, two hundred twenty-one".