231113331 has 20 divisors (see below), whose sum is σ = 349133400. Its totient is φ = 152339616.

The previous prime is 231113329. The next prime is 231113341. The reversal of 231113331 is 133311132.

It is a happy number.

231113331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231113331 - 2¹ = 231113329 is a prime.

It is a super-2 number, since 2×231113331² = 106826743531831122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231113341) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8821 + ... + 23238.

It is an arithmetic number, because the mean of its divisors is an integer number (17456670).

Almost surely, 2^231113331 is an apocalyptic number.

231113331 is a deficient number, since it is larger than the sum of its proper divisors (118020069).

231113331 is an equidigital number, since it uses as much as digits as its factorization.

231113331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32160 (or 32151 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 231113331 is about 15202.4120125722. The cubic root of 231113331 is about 613.6795703449.

Adding to 231113331 its reverse (133311132), we get a palindrome (364424463).

The spelling of 231113331 in words is "two hundred thirty-one million, one hundred thirteen thousand, three hundred thirty-one".