231433332 has 72 divisors (see below), whose sum is σ = 589669920. Its totient is φ = 70611840.

The previous prime is 231433331. The next prime is 231433333. The reversal of 231433332 is 233334132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231433331) and next prime (231433333).

It is a super-2 number, since 2×231433332² = 107122774321244448, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231433331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281482 + ... + 282302.

It is an arithmetic number, because the mean of its divisors is an integer number (8189860).

Almost surely, 2^231433332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231433332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294834960).

231433332 is an abundant number, since it is smaller than the sum of its proper divisors (358236588).

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

231433332 is a wasteful number, since it uses less digits than its factorization.

231433332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 978 counting only the distinct ones).

The product of its digits is 3888, while the sum is 24.

The square root of 231433332 is about 15212.9330505330. The cubic root of 231433332 is about 613.9626746118.

Adding to 231433332 its reverse (233334132), we get a palindrome (464767464).

The spelling of 231433332 in words is "two hundred thirty-one million, four hundred thirty-three thousand, three hundred thirty-two".