22504397 has 2 divisors, whose sum is σ = 22504398. Its totient is φ = 22504396.

The previous prime is 22504393. The next prime is 22504403. The reversal of 22504397 is 79340522.

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., 17255716 + 5248681 = 4154^2 + 2291^2 .

It is a cyclic number.

It is not a de Polignac number, because 22504397 - 2² = 22504393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22504393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252198 + 11252199.

It is an arithmetic number, because the mean of its divisors is an integer number (11252199).

Almost surely, 2^22504397 is an apocalyptic number.

It is an amenable number.

22504397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22504397 is an equidigital number, since it uses as much as digits as its factorization.

22504397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 22504397 is about 4743.8799521067. The cubic root of 22504397 is about 282.3291974017.

The spelling of 22504397 in words is "twenty-two million, five hundred four thousand, three hundred ninety-seven".