22097213 has 2 divisors, whose sum is σ = 22097214. Its totient is φ = 22097212.

The previous prime is 22097197. The next prime is 22097219. The reversal of 22097213 is 31279022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16957924 + 5139289 = 4118^2 + 2267^2 .

It is a cyclic number.

It is not a de Polignac number, because 22097213 - 2⁴ = 22097197 is a prime.

It is a super-3 number, since 3×22097213³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22097219) 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, 11048606 + 11048607.

It is an arithmetic number, because the mean of its divisors is an integer number (11048607).

Almost surely, 2^22097213 is an apocalyptic number.

It is an amenable number.

22097213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22097213 is an equidigital number, since it uses as much as digits as its factorization.

22097213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22097213 is about 4700.7672777963. The cubic root of 22097213 is about 280.6160458153.

The spelling of 22097213 in words is "twenty-two million, ninety-seven thousand, two hundred thirteen".