22729231 has 8 divisors (see below), whose sum is σ = 26814464. Its totient is φ = 18853560.

The previous prime is 22729199. The next prime is 22729237. The reversal of 22729231 is 13292722.

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 22729231 - 2⁵ = 22729199 is a prime.

It is a super-2 number, since 2×22729231² = 1033235883702722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22729231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729237) 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, 52155 + ... + 52588.

It is an arithmetic number, because the mean of its divisors is an integer number (3351808).

Almost surely, 2^22729231 is an apocalyptic number.

22729231 is a deficient number, since it is larger than the sum of its proper divisors (4085233).

22729231 is a wasteful number, since it uses less digits than its factorization.

22729231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104781.

The product of its digits is 3024, while the sum is 28.

The square root of 22729231 is about 4767.5183271803. The cubic root of 22729231 is about 283.2663027899.

The spelling of 22729231 in words is "twenty-two million, seven hundred twenty-nine thousand, two hundred thirty-one".