22626257 has 2 divisors, whose sum is σ = 22626258. Its totient is φ = 22626256.

The previous prime is 22626251. The next prime is 22626259. The reversal of 22626257 is 75262622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15178816 + 7447441 = 3896^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 22626257 - 2¹⁰ = 22625233 is a prime.

Together with 22626259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22626251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11313128 + 11313129.

It is an arithmetic number, because the mean of its divisors is an integer number (11313129).

Almost surely, 2^22626257 is an apocalyptic number.

It is an amenable number.

22626257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22626257 is an equidigital number, since it uses as much as digits as its factorization.

22626257 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 22626257 is about 4756.7065286814. The cubic root of 22626257 is about 282.8378790671.

Adding to 22626257 its reverse (75262622), we get a palindrome (97888879).

The spelling of 22626257 in words is "twenty-two million, six hundred twenty-six thousand, two hundred fifty-seven".