231132330 has 96 divisors (see below), whose sum is σ = 706043520. Its totient is φ = 51719040.

The previous prime is 231132299. The next prime is 231132337. The reversal of 231132330 is 33231132.

231132330 is a `hidden beast` number, since 2 + 311 + 323 + 30 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (231132337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3891 + ... + 21849.

It is an arithmetic number, because the mean of its divisors is an integer number (7354620).

Almost surely, 2^231132330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231132330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353021760).

231132330 is an abundant number, since it is smaller than the sum of its proper divisors (474911190).

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

231132330 is a wasteful number, since it uses less digits than its factorization.

231132330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17996 (or 17993 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231132330 is about 15203.0368676788. The cubic root of 231132330 is about 613.6963860180.

Adding to 231132330 its reverse (33231132), we get a palindrome (264363462).

The spelling of 231132330 in words is "two hundred thirty-one million, one hundred thirty-two thousand, three hundred thirty".