231332113 has 4 divisors (see below), whose sum is σ = 231473380. Its totient is φ = 231190848.

The previous prime is 231332089. The next prime is 231332149. The reversal of 231332113 is 311233132.

231332113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161976529 + 69355584 = 12727^2 + 8328^2 .

It is a cyclic number.

It is not a de Polignac number, because 231332113 - 2⁹ = 231331601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231332513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68148 + ... + 71461.

It is an arithmetic number, because the mean of its divisors is an integer number (57868345).

Almost surely, 2^231332113 is an apocalyptic number.

It is an amenable number.

231332113 is a deficient number, since it is larger than the sum of its proper divisors (141267).

231332113 is a wasteful number, since it uses less digits than its factorization.

231332113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141266.

The product of its digits is 324, while the sum is 19.

The square root of 231332113 is about 15209.6059449284. The cubic root of 231332113 is about 613.8731545911.

Adding to 231332113 its reverse (311233132), we get a palindrome (542565245).

The spelling of 231332113 in words is "two hundred thirty-one million, three hundred thirty-two thousand, one hundred thirteen".