231101231 has 8 divisors (see below), whose sum is σ = 233702400. Its totient is φ = 228506400.

The previous prime is 231101219. The next prime is 231101251. The reversal of 231101231 is 132101132.

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-231101231 is a prime.

It is a super-2 number, since 2×231101231² = 106815557939430722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128285 + ... + 130073.

It is an arithmetic number, because the mean of its divisors is an integer number (29212800).

Almost surely, 2^231101231 is an apocalyptic number.

231101231 is a deficient number, since it is larger than the sum of its proper divisors (2601169).

231101231 is a wasteful number, since it uses less digits than its factorization.

231101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 231101231 is about 15202.0140441982. The cubic root of 231101231 is about 613.6688603722.

Adding to 231101231 its reverse (132101132), we get a palindrome (363202363).

Subtracting from 231101231 its reverse (132101132), we obtain a palindrome (99000099).

The spelling of 231101231 in words is "two hundred thirty-one million, one hundred one thousand, two hundred thirty-one".