22215665737 has 2 divisors, whose sum is σ = 22215665738. Its totient is φ = 22215665736.

The previous prime is 22215665699. The next prime is 22215665743. The reversal of 22215665737 is 73756651222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20060756496 + 2154909241 = 141636^2 + 46421^2 .

It is a cyclic number.

It is not a de Polignac number, because 22215665737 - 2⁷ = 22215665609 is a prime.

It is not a weakly prime, because it can be changed into another prime (22215662737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107832868 + 11107832869.

It is an arithmetic number, because the mean of its divisors is an integer number (11107832869).

Almost surely, 2^22215665737 is an apocalyptic number.

It is an amenable number.

22215665737 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215665737 is an equidigital number, since it uses as much as digits as its factorization.

22215665737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 46.

The spelling of 22215665737 in words is "twenty-two billion, two hundred fifteen million, six hundred sixty-five thousand, seven hundred thirty-seven".