231033222 has 56 divisors (see below), whose sum is σ = 593840016. Its totient is φ = 66006576.

The previous prime is 231033197. The next prime is 231033233. The reversal of 231033222 is 222330132.

It is a happy number.

231033222 is a `hidden beast` number, since 2 + 310 + 332 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231033195 and 231033204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1113 + ... + 21524.

It is an arithmetic number, because the mean of its divisors is an integer number (10604286).

Almost surely, 2^231033222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231033222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296920008).

231033222 is an abundant number, since it is smaller than the sum of its proper divisors (362806794).

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

231033222 is an equidigital number, since it uses as much as digits as its factorization.

231033222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22664 (or 22649 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231033222 is about 15199.7770378384. Note that the first 3 decimals coincide. The cubic root of 231033222 is about 613.6086571733.

Adding to 231033222 its reverse (222330132), we get a palindrome (453363354).

The spelling of 231033222 in words is "two hundred thirty-one million, thirty-three thousand, two hundred twenty-two".