22259999 has 4 divisors (see below), whose sum is σ = 22733664. Its totient is φ = 21786336.

The previous prime is 22259981. The next prime is 22260031. The reversal of 22259999 is 99995222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22259999 - 2¹² = 22255903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 473617 = 22259999 / (2 + 2 + 2 + 5 + 9 + 9 + 9 + 9).

It is a Duffinian number.

22259999 is a modest number, since divided by 9999 gives 2225 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22259399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236762 + ... + 236855.

It is an arithmetic number, because the mean of its divisors is an integer number (5683416).

Almost surely, 2^22259999 is an apocalyptic number.

22259999 is a deficient number, since it is larger than the sum of its proper divisors (473665).

22259999 is an equidigital number, since it uses as much as digits as its factorization.

22259999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473664.

The product of its digits is 262440, while the sum is 47.

The square root of 22259999 is about 4718.0503388582. The cubic root of 22259999 is about 281.3034424205.

The spelling of 22259999 in words is "twenty-two million, two hundred fifty-nine thousand, nine hundred ninety-nine".