22152145521 has 16 divisors (see below), whose sum is σ = 32275123200. Its totient is φ = 13403117520.

The previous prime is 22152145517. The next prime is 22152145531. The reversal of 22152145521 is 12554125122.

It is not a de Polignac number, because 22152145521 - 2² = 22152145517 is a prime.

It is a super-2 number, since 2×22152145521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22152145501) 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, 540565 + ... + 580098.

It is an arithmetic number, because the mean of its divisors is an integer number (2017195200).

Almost surely, 2^22152145521 is an apocalyptic number.

It is an amenable number.

22152145521 is a deficient number, since it is larger than the sum of its proper divisors (10122977679).

22152145521 is a wasteful number, since it uses less digits than its factorization.

22152145521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121276.

The product of its digits is 8000, while the sum is 30.

The spelling of 22152145521 in words is "twenty-two billion, one hundred fifty-two million, one hundred forty-five thousand, five hundred twenty-one".