22225491 has 12 divisors (see below), whose sum is σ = 32491368. Its totient is φ = 14637984.

The previous prime is 22225471. The next prime is 22225499. The reversal of 22225491 is 19452222.

It is a happy number.

It is not a de Polignac number, because 22225491 - 2²² = 18031187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22225499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14130 + ... + 15623.

It is an arithmetic number, because the mean of its divisors is an integer number (2707614).

Almost surely, 2^22225491 is an apocalyptic number.

22225491 is a deficient number, since it is larger than the sum of its proper divisors (10265877).

22225491 is a wasteful number, since it uses less digits than its factorization.

22225491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29842 (or 29839 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22225491 is about 4714.3919014015. The cubic root of 22225491 is about 281.1580060612.

The spelling of 22225491 in words is "twenty-two million, two hundred twenty-five thousand, four hundred ninety-one".