22556143343621 has 16 divisors (see below), whose sum is σ = 23043991806000. Its totient is φ = 22070648291328.

The previous prime is 22556143343611. The next prime is 22556143343653. The reversal of 22556143343621 is 12634334165522.

It can be written as a sum of positive squares in 8 ways, for example, as 418751352100 + 22137391991521 = 647110^2 + 4705039^2 .

It is a cyclic number.

It is not a de Polignac number, because 22556143343621 - 2²² = 22556139149317 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 (22556143343611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49485065 + ... + 49938801.

It is an arithmetic number, because the mean of its divisors is an integer number (1440249487875).

Almost surely, 2^{22556143343621} is an apocalyptic number.

It is an amenable number.

22556143343621 is a deficient number, since it is larger than the sum of its proper divisors (487848462379).

22556143343621 is a wasteful number, since it uses less digits than its factorization.

22556143343621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456328.

The product of its digits is 3110400, while the sum is 47.

The spelling of 22556143343621 in words is "twenty-two trillion, five hundred fifty-six billion, one hundred forty-three million, three hundred forty-three thousand, six hundred twenty-one".