231210222 has 16 divisors (see below), whose sum is σ = 468934272. Its totient is φ = 75984440.

The previous prime is 231210197. The next prime is 231210223. The reversal of 231210222 is 222012132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231210223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270948 + ... + 271799.

It is an arithmetic number, because the mean of its divisors is an integer number (29308392).

Almost surely, 2^231210222 is an apocalyptic number.

231210222 is an abundant number, since it is smaller than the sum of its proper divisors (237724050).

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

231210222 is a wasteful number, since it uses less digits than its factorization.

231210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542823.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 231210222 is about 15205.5983769137. The cubic root of 231210222 is about 613.7653171943.

Adding to 231210222 its reverse (222012132), we get a palindrome (453222354).

The spelling of 231210222 in words is "two hundred thirty-one million, two hundred ten thousand, two hundred twenty-two".