22287109 has 16 divisors (see below), whose sum is σ = 25643520. Its totient is φ = 19212480.

The previous prime is 22287107. The next prime is 22287163. The reversal of 22287109 is 90178222.

It is a cyclic number.

It is not a de Polignac number, because 22287109 - 2¹ = 22287107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287101) 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, 10734 + ... + 12640.

It is an arithmetic number, because the mean of its divisors is an integer number (1602720).

Almost surely, 2^22287109 is an apocalyptic number.

22287109 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22287109 is a deficient number, since it is larger than the sum of its proper divisors (3356411).

22287109 is a wasteful number, since it uses less digits than its factorization.

22287109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22287109 is about 4720.9224734156. The cubic root of 22287109 is about 281.4175940056.

The spelling of 22287109 in words is "twenty-two million, two hundred eighty-seven thousand, one hundred nine".