22666231 has 4 divisors (see below), whose sum is σ = 25904272. Its totient is φ = 19428192.

The previous prime is 22666213. The next prime is 22666249. The reversal of 22666231 is 13266622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22666213) and next prime (22666249).

It is not a de Polignac number, because 22666231 - 2¹⁵ = 22633463 is a prime.

It is a super-2 number, since 2×22666231² = 1027516055490722, 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 22666231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666211) 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, 1619010 + ... + 1619023.

It is an arithmetic number, because the mean of its divisors is an integer number (6476068).

Almost surely, 2^22666231 is an apocalyptic number.

22666231 is a deficient number, since it is larger than the sum of its proper divisors (3238041).

22666231 is an equidigital number, since it uses as much as digits as its factorization.

22666231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238040.

The product of its digits is 5184, while the sum is 28.

The square root of 22666231 is about 4760.9065313236. The cubic root of 22666231 is about 283.0043450993.

The spelling of 22666231 in words is "twenty-two million, six hundred sixty-six thousand, two hundred thirty-one".