231222032 has 20 divisors (see below), whose sum is σ = 474345756. Its totient is φ = 108810240.

The previous prime is 231222031. The next prime is 231222053. The reversal of 231222032 is 230222132.

It can be written as a sum of positive squares in 2 ways, for example, as 202663696 + 28558336 = 14236^2 + 5344^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 231222032.

It is not an unprimeable number, because it can be changed into a prime (231222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424769 + ... + 425312.

Almost surely, 2^231222032 is an apocalyptic number.

It is an amenable number.

231222032 is an abundant number, since it is smaller than the sum of its proper divisors (243123724).

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

231222032 is a wasteful number, since it uses less digits than its factorization.

231222032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850106 (or 850100 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 231222032 is about 15205.9867157643. The cubic root of 231222032 is about 613.7757672008.

Adding to 231222032 its reverse (230222132), we get a palindrome (461444164).

The spelling of 231222032 in words is "two hundred thirty-one million, two hundred twenty-two thousand, thirty-two".