231011222 has 32 divisors (see below), whose sum is σ = 385093632. Its totient is φ = 103257504.

The previous prime is 231011219. The next prime is 231011227. The reversal of 231011222 is 222110132.

It is a happy number.

231011222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231011197 and 231011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141173 + ... + 142799.

It is an arithmetic number, because the mean of its divisors is an integer number (12034176).

Almost surely, 2^231011222 is an apocalyptic number.

231011222 is a deficient number, since it is larger than the sum of its proper divisors (154082410).

231011222 is a wasteful number, since it uses less digits than its factorization.

231011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 231011222 is about 15199.0533257832. The cubic root of 231011222 is about 613.5891797162.

Adding to 231011222 its reverse (222110132), we get a palindrome (453121354).

The spelling of 231011222 in words is "two hundred thirty-one million, eleven thousand, two hundred twenty-two".