22244435657 has 2 divisors, whose sum is σ = 22244435658. Its totient is φ = 22244435656.

The previous prime is 22244435627. The next prime is 22244435659. The reversal of 22244435657 is 75653444222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18774754441 + 3469681216 = 137021^2 + 58904^2 .

It is a cyclic number.

It is not a de Polignac number, because 22244435657 - 2¹⁰ = 22244434633 is a prime.

Together with 22244435659, 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 (22244435659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11122217828 + 11122217829.

It is an arithmetic number, because the mean of its divisors is an integer number (11122217829).

Almost surely, 2^22244435657 is an apocalyptic number.

It is an amenable number.

22244435657 is a deficient number, since it is larger than the sum of its proper divisors (1).

22244435657 is an equidigital number, since it uses as much as digits as its factorization.

22244435657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 44.

Adding to 22244435657 its reverse (75653444222), we get a palindrome (97897879879).

The spelling of 22244435657 in words is "twenty-two billion, two hundred forty-four million, four hundred thirty-five thousand, six hundred fifty-seven".