22509329 has 2 divisors, whose sum is σ = 22509330. Its totient is φ = 22509328.

The previous prime is 22509323. The next prime is 22509371. The reversal of 22509329 is 92390522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21836929 + 672400 = 4673^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 22509329 - 2⁴ = 22509313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22509295 and 22509304.

It is not a weakly prime, because it can be changed into another prime (22509323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254664 + 11254665.

It is an arithmetic number, because the mean of its divisors is an integer number (11254665).

Almost surely, 2^22509329 is an apocalyptic number.

It is an amenable number.

22509329 is a deficient number, since it is larger than the sum of its proper divisors (1).

22509329 is an equidigital number, since it uses as much as digits as its factorization.

22509329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 22509329 is about 4744.3997512857. The cubic root of 22509329 is about 282.3498207180.

The spelling of 22509329 in words is "twenty-two million, five hundred nine thousand, three hundred twenty-nine".