22516397 has 2 divisors, whose sum is σ = 22516398. Its totient is φ = 22516396.

The previous prime is 22516393. The next prime is 22516399. The reversal of 22516397 is 79361522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21473956 + 1042441 = 4634^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 22516397 - 2² = 22516393 is a prime.

Together with 22516399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22516393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11258198 + 11258199.

It is an arithmetic number, because the mean of its divisors is an integer number (11258199).

Almost surely, 2^22516397 is an apocalyptic number.

It is an amenable number.

22516397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22516397 is an equidigital number, since it uses as much as digits as its factorization.

22516397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 22516397 is about 4745.1445710326. The cubic root of 22516397 is about 282.3793705355.

The spelling of 22516397 in words is "twenty-two million, five hundred sixteen thousand, three hundred ninety-seven".