22225791 has 16 divisors (see below), whose sum is σ = 34961408. Its totient is φ = 12290400.

The previous prime is 22225787. The next prime is 22225807. The reversal of 22225791 is 19752222.

It is not a de Polignac number, because 22225791 - 2² = 22225787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22225771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16420 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (2185088).

Almost surely, 2^22225791 is an apocalyptic number.

22225791 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22225791 is a deficient number, since it is larger than the sum of its proper divisors (12735617).

22225791 is a wasteful number, since it uses less digits than its factorization.

22225791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34182.

The product of its digits is 5040, while the sum is 30.

The square root of 22225791 is about 4714.4237187593. The cubic root of 22225791 is about 281.1592710804.

The spelling of 22225791 in words is "twenty-two million, two hundred twenty-five thousand, seven hundred ninety-one".