22288397 has 2 divisors, whose sum is σ = 22288398. Its totient is φ = 22288396.

The previous prime is 22288381. The next prime is 22288439. The reversal of 22288397 is 79388222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17355556 + 4932841 = 4166^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 22288397 - 2⁴ = 22288381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144198 + 11144199.

It is an arithmetic number, because the mean of its divisors is an integer number (11144199).

Almost surely, 2^22288397 is an apocalyptic number.

It is an amenable number.

22288397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288397 is an equidigital number, since it uses as much as digits as its factorization.

22288397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 22288397 is about 4721.0588854620. The cubic root of 22288397 is about 281.4230150598.

The spelling of 22288397 in words is "twenty-two million, two hundred eighty-eight thousand, three hundred ninety-seven".