22556645246221 has 8 divisors (see below), whose sum is σ = 22621569636344. Its totient is φ = 22491774627840.

The previous prime is 22556645246183. The next prime is 22556645246237. The reversal of 22556645246221 is 12264254665522.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 661775625 + 22555983470596 = 25725^2 + 4749314^2 .

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 22556645246221 - 2⁹ = 22556645245709 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 (22556645246321) 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, 12602676 + ... + 14280781.

It is an arithmetic number, because the mean of its divisors is an integer number (2827696204543).

Almost surely, 2^{22556645246221} is an apocalyptic number.

It is an amenable number.

22556645246221 is a deficient number, since it is larger than the sum of its proper divisors (64924390123).

22556645246221 is a wasteful number, since it uses less digits than its factorization.

22556645246221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26885871.

The product of its digits is 13824000, while the sum is 52.

The spelling of 22556645246221 in words is "twenty-two trillion, five hundred fifty-six billion, six hundred forty-five million, two hundred forty-six thousand, two hundred twenty-one".