231301332 has 120 divisors (see below), whose sum is σ = 634233600. Its totient is φ = 73410624.

The previous prime is 231301321. The next prime is 231301333. The reversal of 231301332 is 233103132.

231301332 is a `hidden beast` number, since 2 + 31 + 301 + 332 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231301333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 967669 + ... + 967907.

It is an arithmetic number, because the mean of its divisors is an integer number (5285280).

Almost surely, 2^231301332 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 231301332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317116800).

231301332 is an abundant number, since it is smaller than the sum of its proper divisors (402932268).

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

231301332 is a wasteful number, since it uses less digits than its factorization.

231301332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 376 counting only the distinct ones).

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

The square root of 231301332 is about 15208.5940178571. The cubic root of 231301332 is about 613.8459261078.

Adding to 231301332 its reverse (233103132), we get a palindrome (464404464).

The spelling of 231301332 in words is "two hundred thirty-one million, three hundred one thousand, three hundred thirty-two".