22288999 has 2 divisors, whose sum is σ = 22289000. Its totient is φ = 22288998.

The previous prime is 22288993. The next prime is 22289009. The reversal of 22288999 is 99988222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22288999 - 2⁵ = 22288967 is a prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144499 + 11144500.

It is an arithmetic number, because the mean of its divisors is an integer number (11144500).

Almost surely, 2^22288999 is an apocalyptic number.

22288999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288999 is an equidigital number, since it uses as much as digits as its factorization.

22288999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 22288999 is about 4721.1226419147. The cubic root of 22288999 is about 281.4255487418.

The spelling of 22288999 in words is "twenty-two million, two hundred eighty-eight thousand, nine hundred ninety-nine".