231612231 has 8 divisors (see below), whose sum is σ = 322243200. Its totient is φ = 147694712.

The previous prime is 231612221. The next prime is 231612259. The reversal of 231612231 is 132216132.

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

It is a cyclic number.

It is not a de Polignac number, because 231612231 - 2⁶ = 231612167 is a prime.

It is a super-2 number, since 2×231612231² = 107288451097594722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231612198 and 231612207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231612221) 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, 1678281 + ... + 1678418.

It is an arithmetic number, because the mean of its divisors is an integer number (40280400).

Almost surely, 2^231612231 is an apocalyptic number.

231612231 is a deficient number, since it is larger than the sum of its proper divisors (90630969).

231612231 is a wasteful number, since it uses less digits than its factorization.

231612231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356725.

The product of its digits is 432, while the sum is 21.

The square root of 231612231 is about 15218.8117473080. The cubic root of 231612231 is about 614.1208324970.

Adding to 231612231 its reverse (132216132), we get a palindrome (363828363).

The spelling of 231612231 in words is "two hundred thirty-one million, six hundred twelve thousand, two hundred thirty-one".