22888155221 has 2 divisors, whose sum is σ = 22888155222. Its totient is φ = 22888155220.

The previous prime is 22888155203. The next prime is 22888155223. The reversal of 22888155221 is 12255188822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22551028900 + 337126321 = 150170^2 + 18361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22888155221 is a prime.

Together with 22888155223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22888155223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11444077610 + 11444077611.

It is an arithmetic number, because the mean of its divisors is an integer number (11444077611).

Almost surely, 2^22888155221 is an apocalyptic number.

It is an amenable number.

22888155221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22888155221 is an equidigital number, since it uses as much as digits as its factorization.

22888155221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204800, while the sum is 44.

The spelling of 22888155221 in words is "twenty-two billion, eight hundred eighty-eight million, one hundred fifty-five thousand, two hundred twenty-one".