22318897 has 2 divisors, whose sum is σ = 22318898. Its totient is φ = 22318896.

The previous prime is 22318889. The next prime is 22318927. The reversal of 22318897 is 79881322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20466576 + 1852321 = 4524^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 22318897 - 2³ = 22318889 is a prime.

It is a super-3 number, since 3×22318897³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22318817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11159448 + 11159449.

It is an arithmetic number, because the mean of its divisors is an integer number (11159449).

Almost surely, 2^22318897 is an apocalyptic number.

It is an amenable number.

22318897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22318897 is an equidigital number, since it uses as much as digits as its factorization.

22318897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 22318897 is about 4724.2879886815. The cubic root of 22318897 is about 281.5513253145.

The spelling of 22318897 in words is "twenty-two million, three hundred eighteen thousand, eight hundred ninety-seven".