231000222 has 16 divisors (see below), whose sum is σ = 469831680. Its totient is φ = 75694872.

The previous prime is 231000193. The next prime is 231000239. The reversal of 231000222 is 222000132.

231000222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231000222² = 106722205128098568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231000198 and 231000207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325918 + ... + 326625.

It is an arithmetic number, because the mean of its divisors is an integer number (29364480).

Almost surely, 2^231000222 is an apocalyptic number.

231000222 is an abundant number, since it is smaller than the sum of its proper divisors (238831458).

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

231000222 is a wasteful number, since it uses less digits than its factorization.

231000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652607.

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

The square root of 231000222 is about 15198.6914568327. The cubic root of 231000222 is about 613.5794405240.

Adding to 231000222 its reverse (222000132), we get a palindrome (453000354).

The spelling of 231000222 in words is "two hundred thirty-one million, two hundred twenty-two", and thus it is an aban number.