22556541261521 has 4 divisors (see below), whose sum is σ = 22560401705712. Its totient is φ = 22552680817332.

The previous prime is 22556541261497. The next prime is 22556541261563. The reversal of 22556541261521 is 12516214565522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22556541261521 is a prime.

It is a super-2 number, since 2×22556541261521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22556541261721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930213331 + ... + 1930225016.

It is an arithmetic number, because the mean of its divisors is an integer number (5640100426428).

Almost surely, 2^{22556541261521} is an apocalyptic number.

It is an amenable number.

22556541261521 is a deficient number, since it is larger than the sum of its proper divisors (3860444191).

22556541261521 is an equidigital number, since it uses as much as digits as its factorization.

22556541261521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860444190.

The product of its digits is 1440000, while the sum is 47.

The spelling of 22556541261521 in words is "twenty-two trillion, five hundred fifty-six billion, five hundred forty-one million, two hundred sixty-one thousand, five hundred twenty-one".