22122409 has 2 divisors, whose sum is σ = 22122410. Its totient is φ = 22122408.

The previous prime is 22122391. The next prime is 22122413. The reversal of 22122409 is 90422122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 9018009 = 3620^2 + 3003^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122409 - 2⁷ = 22122281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22122409.

It is not a weakly prime, because it can be changed into another prime (22122469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061204 + 11061205.

It is an arithmetic number, because the mean of its divisors is an integer number (11061205).

Almost surely, 2^22122409 is an apocalyptic number.

It is an amenable number.

22122409 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122409 is an equidigital number, since it uses as much as digits as its factorization.

22122409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 22122409 is about 4703.4465023002. The cubic root of 22122409 is about 280.7226613160.

The spelling of 22122409 in words is "twenty-two million, one hundred twenty-two thousand, four hundred nine".