231222 has 16 divisors (see below), whose sum is σ = 468720. Its totient is φ = 76032.

The previous prime is 231197. The next prime is 231223. The reversal of 231222 is 222132.

231222 is nontrivially palindromic in base 5.

231222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231222² = 106927226568, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 231198 and 231207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231223) by changing a digit.

231222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (29295).

2²³¹²²² is an apocalyptic number.

231222 is an abundant number, since it is smaller than the sum of its proper divisors (237498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231222 is a wasteful number, since it uses less digits than its factorization.

231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527.

The product of its digits is 48, while the sum is 12.

The square root of 231222 is about 480.8554876468. The cubic root of 231222 is about 61.3775738886.

Adding to 231222 its reverse (222132), we get a palindrome (453354).

The spelling of 231222 in words is "two hundred thirty-one thousand, two hundred twenty-two".