22441572521 has 2 divisors, whose sum is σ = 22441572522. Its totient is φ = 22441572520.

The previous prime is 22441572511. The next prime is 22441572523. The reversal of 22441572521 is 12527514422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18180746896 + 4260825625 = 134836^2 + 65275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22441572521 is a prime.

Together with 22441572523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22441572523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11220786260 + 11220786261.

It is an arithmetic number, because the mean of its divisors is an integer number (11220786261).

Almost surely, 2^22441572521 is an apocalyptic number.

It is an amenable number.

22441572521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22441572521 is an equidigital number, since it uses as much as digits as its factorization.

22441572521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44800, while the sum is 35.

The spelling of 22441572521 in words is "twenty-two billion, four hundred forty-one million, five hundred seventy-two thousand, five hundred twenty-one".