22057397 has 2 divisors, whose sum is σ = 22057398. Its totient is φ = 22057396.

The previous prime is 22057393. The next prime is 22057403. The reversal of 22057397 is 79375022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11874916 + 10182481 = 3446^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 22057397 - 2² = 22057393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22057393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11028698 + 11028699.

It is an arithmetic number, because the mean of its divisors is an integer number (11028699).

Almost surely, 2^22057397 is an apocalyptic number.

It is an amenable number.

22057397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22057397 is an equidigital number, since it uses as much as digits as its factorization.

22057397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 22057397 is about 4696.5303150304. The cubic root of 22057397 is about 280.4474012306.

The spelling of 22057397 in words is "twenty-two million, fifty-seven thousand, three hundred ninety-seven".