22553235521 has 8 divisors (see below), whose sum is σ = 23929758720. Its totient is φ = 21182252608.

The previous prime is 22553235517. The next prime is 22553235563. The reversal of 22553235521 is 12553235522.

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 22553235521 - 2² = 22553235517 is a prime.

It is a super-2 number, since 2×22553235521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22553235121) 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, 1376681 + ... + 1392966.

It is an arithmetic number, because the mean of its divisors is an integer number (2991219840).

Almost surely, 2^22553235521 is an apocalyptic number.

It is an amenable number.

22553235521 is a deficient number, since it is larger than the sum of its proper divisors (1376523199).

22553235521 is a wasteful number, since it uses less digits than its factorization.

22553235521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770143.

The product of its digits is 90000, while the sum is 35.

Subtracting from 22553235521 its reverse (12553235522), we obtain a palindrome (9999999999).

The spelling of 22553235521 in words is "twenty-two billion, five hundred fifty-three million, two hundred thirty-five thousand, five hundred twenty-one".