22170506609 has 2 divisors, whose sum is σ = 22170506610. Its totient is φ = 22170506608.

The previous prime is 22170506593. The next prime is 22170506621. The reversal of 22170506609 is 90660507122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17385741025 + 4784765584 = 131855^2 + 69172^2 .

It is a cyclic number.

It is not a de Polignac number, because 22170506609 - 2⁴ = 22170506593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22170506209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11085253304 + 11085253305.

It is an arithmetic number, because the mean of its divisors is an integer number (11085253305).

Almost surely, 2^22170506609 is an apocalyptic number.

It is an amenable number.

22170506609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22170506609 is an equidigital number, since it uses as much as digits as its factorization.

22170506609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 22170506609 in words is "twenty-two billion, one hundred seventy million, five hundred six thousand, six hundred nine".