231322331 has 8 divisors (see below), whose sum is σ = 234885600. Its totient is φ = 227767680.

The previous prime is 231322319. The next prime is 231322363. The reversal of 231322331 is 133223132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231322331 is a prime.

It is a super-2 number, since 2×231322331² = 107020041638547122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231312331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70025 + ... + 73253.

It is an arithmetic number, because the mean of its divisors is an integer number (29360700).

Almost surely, 2^231322331 is an apocalyptic number.

231322331 is a deficient number, since it is larger than the sum of its proper divisors (3563269).

231322331 is a wasteful number, since it uses less digits than its factorization.

231322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309.

The product of its digits is 648, while the sum is 20.

The square root of 231322331 is about 15209.2843684376. The cubic root of 231322331 is about 613.8645018195.

Adding to 231322331 its reverse (133223132), we get a palindrome (364545463).

The spelling of 231322331 in words is "two hundred thirty-one million, three hundred twenty-two thousand, three hundred thirty-one".