22388231 has 8 divisors (see below), whose sum is σ = 23180928. Its totient is φ = 21600000.

The previous prime is 22388227. The next prime is 22388237. The reversal of 22388231 is 13288322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22388231 - 2² = 22388227 is a prime.

It is a super-2 number, since 2×22388231² = 1002465774618722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22388194 and 22388203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22388237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11531 + ... + 13331.

It is an arithmetic number, because the mean of its divisors is an integer number (2897616).

Almost surely, 2^22388231 is an apocalyptic number.

22388231 is a deficient number, since it is larger than the sum of its proper divisors (792697).

22388231 is a wasteful number, since it uses less digits than its factorization.

22388231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233.

The product of its digits is 4608, while the sum is 29.

The square root of 22388231 is about 4731.6203355722. The cubic root of 22388231 is about 281.8425717894.

Subtracting from 22388231 its reverse (13288322), we obtain a palindrome (9099909).

The spelling of 22388231 in words is "twenty-two million, three hundred eighty-eight thousand, two hundred thirty-one".