22288897 has 2 divisors, whose sum is σ = 22288898. Its totient is φ = 22288896.

The previous prime is 22288879. The next prime is 22288913. The reversal of 22288897 is 79888222.

Together with previous prime (22288879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20647936 + 1640961 = 4544^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 22288897 - 2⁷ = 22288769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22288807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144448 + 11144449.

It is an arithmetic number, because the mean of its divisors is an integer number (11144449).

Almost surely, 2^22288897 is an apocalyptic number.

It is an amenable number.

22288897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288897 is an equidigital number, since it uses as much as digits as its factorization.

22288897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 22288897 is about 4721.1118393870. Note that the first 3 decimals coincide. The cubic root of 22288897 is about 281.4251194501.

The spelling of 22288897 in words is "twenty-two million, two hundred eighty-eight thousand, eight hundred ninety-seven".