231215330 has 16 divisors (see below), whose sum is σ = 416557944. Its totient is φ = 92403840.

The previous prime is 231215323. The next prime is 231215339. The reversal of 231215330 is 33512132.

231215330 is digitally balanced in base 3, 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 4 ways, for example, as 209583529 + 21631801 = 14477^2 + 4651^2 .

It is not an unprimeable number, because it can be changed into a prime (231215339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240 + ... + 21620.

Almost surely, 2^231215330 is an apocalyptic number.

231215330 is a deficient number, since it is larger than the sum of its proper divisors (185342614).

231215330 is a wasteful number, since it uses less digits than its factorization.

231215330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20581.

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

The square root of 231215330 is about 15205.7663404381. The cubic root of 231215330 is about 613.7698370206.

Adding to 231215330 its reverse (33512132), we get a palindrome (264727462).

The spelling of 231215330 in words is "two hundred thirty-one million, two hundred fifteen thousand, three hundred thirty".