22657213 has 2 divisors, whose sum is σ = 22657214. Its totient is φ = 22657212.

The previous prime is 22657211. The next prime is 22657237. The reversal of 22657213 is 31275622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13675204 + 8982009 = 3698^2 + 2997^2 .

It is a cyclic number.

It is not a de Polignac number, because 22657213 - 2¹ = 22657211 is a prime.

Together with 22657211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22657211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11328606 + 11328607.

It is an arithmetic number, because the mean of its divisors is an integer number (11328607).

Almost surely, 2^22657213 is an apocalyptic number.

It is an amenable number.

22657213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22657213 is an equidigital number, since it uses as much as digits as its factorization.

22657213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 22657213 is about 4759.9593485659. The cubic root of 22657213 is about 282.9668080289.

The spelling of 22657213 in words is "twenty-two million, six hundred fifty-seven thousand, two hundred thirteen".