22521532521 has 16 divisors (see below), whose sum is σ = 30776039424. Its totient is φ = 14642949264.

The previous prime is 22521532507. The next prime is 22521532547. The reversal of 22521532521 is 12523512522.

It is not a de Polignac number, because 22521532521 - 2⁵ = 22521532489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22521533521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242301 + ... + 322106.

It is an arithmetic number, because the mean of its divisors is an integer number (1923502464).

Almost surely, 2^22521532521 is an apocalyptic number.

It is an amenable number.

22521532521 is a deficient number, since it is larger than the sum of its proper divisors (8254506903).

22521532521 is a wasteful number, since it uses less digits than its factorization.

22521532521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564740.

The product of its digits is 12000, while the sum is 30.

The spelling of 22521532521 in words is "twenty-two billion, five hundred twenty-one million, five hundred thirty-two thousand, five hundred twenty-one".