22515215189 has 2 divisors, whose sum is σ = 22515215190. Its totient is φ = 22515215188.

The previous prime is 22515215183. The next prime is 22515215221. The reversal of 22515215189 is 98151251522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18189916900 + 4325298289 = 134870^2 + 65767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22515215189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22515215183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257607594 + 11257607595.

It is an arithmetic number, because the mean of its divisors is an integer number (11257607595).

Almost surely, 2^22515215189 is an apocalyptic number.

It is an amenable number.

22515215189 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515215189 is an equidigital number, since it uses as much as digits as its factorization.

22515215189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 41.

The spelling of 22515215189 in words is "twenty-two billion, five hundred fifteen million, two hundred fifteen thousand, one hundred eighty-nine".