22662257 has 2 divisors, whose sum is σ = 22662258. Its totient is φ = 22662256.

The previous prime is 22662251. The next prime is 22662301. The reversal of 22662257 is 75226622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12952801 + 9709456 = 3599^2 + 3116^2 .

It is a cyclic number.

It is not a de Polignac number, because 22662257 - 2⁸ = 22662001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22662251) 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, 11331128 + 11331129.

It is an arithmetic number, because the mean of its divisors is an integer number (11331129).

Almost surely, 2^22662257 is an apocalyptic number.

It is an amenable number.

22662257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22662257 is an equidigital number, since it uses as much as digits as its factorization.

22662257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 22662257 is about 4760.4891555385. The cubic root of 22662257 is about 282.9878047078.

Adding to 22662257 its reverse (75226622), we get a palindrome (97888879).

The spelling of 22662257 in words is "twenty-two million, six hundred sixty-two thousand, two hundred fifty-seven".