231531852 has 48 divisors (see below), whose sum is σ = 550174464. Its totient is φ = 75768000.

The previous prime is 231531851. The next prime is 231531877. The reversal of 231531852 is 258135132.

It is not an unprimeable number, because it can be changed into a prime (231531851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281602 + ... + 282422.

It is an arithmetic number, because the mean of its divisors is an integer number (11461968).

Almost surely, 2^231531852 is an apocalyptic number.

It is an amenable number.

231531852 is an abundant number, since it is smaller than the sum of its proper divisors (318642612).

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

231531852 is a wasteful number, since it uses less digits than its factorization.

231531852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1228 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 231531852 is about 15216.1707403670. The cubic root of 231531852 is about 614.0497825219.

Adding to 231531852 its reverse (258135132), we get a palindrome (489666984).

The spelling of 231531852 in words is "two hundred thirty-one million, five hundred thirty-one thousand, eight hundred fifty-two".