22297213 has 2 divisors, whose sum is σ = 22297214. Its totient is φ = 22297212.

The previous prime is 22297211. The next prime is 22297243. The reversal of 22297213 is 31279222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14607684 + 7689529 = 3822^2 + 2773^2 .

It is a cyclic number.

It is not a de Polignac number, because 22297213 - 2¹ = 22297211 is a prime.

Together with 22297211, 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 (22297211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11148606 + 11148607.

It is an arithmetic number, because the mean of its divisors is an integer number (11148607).

Almost surely, 2^22297213 is an apocalyptic number.

It is an amenable number.

22297213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22297213 is an equidigital number, since it uses as much as digits as its factorization.

22297213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 22297213 is about 4721.9924819932. The cubic root of 22297213 is about 281.4601150549.

Subtracting 22297213 from its reverse (31279222), we obtain a square (8982009 = 2997²).

The spelling of 22297213 in words is "twenty-two million, two hundred ninety-seven thousand, two hundred thirteen".