231512330 has 32 divisors (see below), whose sum is σ = 489131136. Its totient is φ = 77229504.

The previous prime is 231512329. The next prime is 231512383. The reversal of 231512330 is 33215132.

231512330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42104 + ... + 47283.

It is an arithmetic number, because the mean of its divisors is an integer number (15285348).

Almost surely, 2^231512330 is an apocalyptic number.

231512330 is an abundant number, since it is smaller than the sum of its proper divisors (257618806).

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

231512330 is a wasteful number, since it uses less digits than its factorization.

231512330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89438.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 231512330 is about 15215.5292382487. The cubic root of 231512330 is about 614.0325238212.

Adding to 231512330 its reverse (33215132), we get a palindrome (264727462).

The spelling of 231512330 in words is "two hundred thirty-one million, five hundred twelve thousand, three hundred thirty".