231168222 has 32 divisors (see below), whose sum is σ = 531424800. Its totient is φ = 74398464.

The previous prime is 231168211. The next prime is 231168229. The reversal of 231168222 is 222861132.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231168229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72243 + ... + 75374.

It is an arithmetic number, because the mean of its divisors is an integer number (16607025).

Almost surely, 2^231168222 is an apocalyptic number.

231168222 is an abundant number, since it is smaller than the sum of its proper divisors (300256578).

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

231168222 is a wasteful number, since it uses less digits than its factorization.

231168222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147657 (or 147651 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 231168222 is about 15204.2172439097. The cubic root of 231168222 is about 613.7281508669.

The spelling of 231168222 in words is "two hundred thirty-one million, one hundred sixty-eight thousand, two hundred twenty-two".