231315330 has 16 divisors (see below), whose sum is σ = 555156864. Its totient is φ = 61684080.

The previous prime is 231315323. The next prime is 231315377. The reversal of 231315330 is 33513132.

231315330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231315297 and 231315306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3855226 + ... + 3855285.

It is an arithmetic number, because the mean of its divisors is an integer number (34697304).

Almost surely, 2^231315330 is an apocalyptic number.

231315330 is an abundant number, since it is smaller than the sum of its proper divisors (323841534).

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

231315330 is a wasteful number, since it uses less digits than its factorization.

231315330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7710521.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 231315330 is about 15209.0542112256. The cubic root of 231315330 is about 613.8583088611.

Adding to 231315330 its reverse (33513132), we get a palindrome (264828462).

The spelling of 231315330 in words is "two hundred thirty-one million, three hundred fifteen thousand, three hundred thirty".