56220254021 has 8 divisors (see below), whose sum is σ = 58178908920. Its totient is φ = 54262934208.

The previous prime is 56220254017. The next prime is 56220254047. The reversal of 56220254021 is 12045202265.

It can be written as a sum of positive squares in 4 ways, for example, as 30192885121 + 26027368900 = 173761^2 + 161330^2 .

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 56220254021 - 2² = 56220254017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56220254071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247706 + ... + 416891.

It is an arithmetic number, because the mean of its divisors is an integer number (7272363615).

Almost surely, 2^56220254021 is an apocalyptic number.

It is an amenable number.

56220254021 is a deficient number, since it is larger than the sum of its proper divisors (1958654899).

56220254021 is a wasteful number, since it uses less digits than its factorization.

56220254021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667543.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 56220254021 its reverse (12045202265), we get a palindrome (68265456286).

The spelling of 56220254021 in words is "fifty-six billion, two hundred twenty million, two hundred fifty-four thousand, twenty-one".