22731889 has 4 divisors (see below), whose sum is σ = 23720256. Its totient is φ = 21743524.

The previous prime is 22731881. The next prime is 22731893. The reversal of 22731889 is 98813722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22731889 - 2³ = 22731881 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22731881) 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, 494149 + ... + 494194.

It is an arithmetic number, because the mean of its divisors is an integer number (5930064).

Almost surely, 2^22731889 is an apocalyptic number.

It is an amenable number.

22731889 is a deficient number, since it is larger than the sum of its proper divisors (988367).

22731889 is an equidigital number, since it uses as much as digits as its factorization.

22731889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988366.

The product of its digits is 48384, while the sum is 40.

The square root of 22731889 is about 4767.7970804136. The cubic root of 22731889 is about 283.2773442617.

The spelling of 22731889 in words is "twenty-two million, seven hundred thirty-one thousand, eight hundred eighty-nine".