222323231 has 4 divisors (see below), whose sum is σ = 239425032. Its totient is φ = 205221432.

The previous prime is 222323177. The next prime is 222323239. The reversal of 222323231 is 132323222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132323222 = 2 ⋅66161611.

It is a de Polignac number, because none of the positive numbers 2^k-222323231 is a prime.

It is a super-2 number, since 2×222323231² = 98855238084558722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222323239) 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, 8550881 + ... + 8550906.

It is an arithmetic number, because the mean of its divisors is an integer number (59856258).

Almost surely, 2^222323231 is an apocalyptic number.

222323231 is a deficient number, since it is larger than the sum of its proper divisors (17101801).

222323231 is a wasteful number, since it uses less digits than its factorization.

222323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17101800.

The product of its digits is 864, while the sum is 20.

The square root of 222323231 is about 14910.5074024998. The cubic root of 222323231 is about 605.7986229412.

Adding to 222323231 its reverse (132323222), we get a palindrome (354646453).

Subtracting from 222323231 its reverse (132323222), we obtain a palindrome (90000009).

The spelling of 222323231 in words is "two hundred twenty-two million, three hundred twenty-three thousand, two hundred thirty-one".