231332130 has 96 divisors (see below), whose sum is σ = 632838960. Its totient is φ = 58544640.

The previous prime is 231332089. The next prime is 231332149. The reversal of 231332130 is 31233132.

231332130 is a `hidden beast` number, since 2 + 313 + 321 + 30 = 666.

231332130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 104837121 + 126495009 = 10239^2 + 11247^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158484 + ... + 159936.

Almost surely, 2^231332130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231332130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316419480).

231332130 is an abundant number, since it is smaller than the sum of its proper divisors (401506830).

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

231332130 is a wasteful number, since it uses less digits than its factorization.

231332130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1553 counting only the distinct ones).

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

The square root of 231332130 is about 15209.6065037857. The cubic root of 231332130 is about 613.8731696284.

Adding to 231332130 its reverse (31233132), we get a palindrome (262565262).

It can be divided in two parts, 2313 and 32130, that added together give a palindrome (34443).

The spelling of 231332130 in words is "two hundred thirty-one million, three hundred thirty-two thousand, one hundred thirty".