231532000 has 96 divisors (see below), whose sum is σ = 650220480. Its totient is φ = 79372800.

The previous prime is 231531991. The next prime is 231532009. The reversal of 231532000 is 235132.

It is an interprime number because it is at equal distance from previous prime (231531991) and next prime (231532009).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231532009) 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, 23866 + ... + 32134.

It is an arithmetic number, because the mean of its divisors is an integer number (6773130).

Almost surely, 2^231532000 is an apocalyptic number.

231532000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231532000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325110240).

231532000 is an abundant number, since it is smaller than the sum of its proper divisors (418688480).

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

231532000 is an equidigital number, since it uses as much as digits as its factorization.

231532000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8301 (or 8283 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 231532000 is about 15216.1756036134. The cubic root of 231532000 is about 614.0499133597.

Adding to 231532000 its reverse (235132), we get a palindrome (231767132).

The spelling of 231532000 in words is "two hundred thirty-one million, five hundred thirty-two thousand".