231132311 has 8 divisors (see below), whose sum is σ = 243091584. Its totient is φ = 219454560.

The previous prime is 231132299. The next prime is 231132337. The reversal of 231132311 is 113231132.

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-231132311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231132311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231132371) 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, 68696 + ... + 71981.

It is an arithmetic number, because the mean of its divisors is an integer number (30386448).

Almost surely, 2^231132311 is an apocalyptic number.

231132311 is a deficient number, since it is larger than the sum of its proper divisors (11959273).

231132311 is a wasteful number, since it uses less digits than its factorization.

231132311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140761.

The product of its digits is 108, while the sum is 17.

The square root of 231132311 is about 15203.0362428036. The cubic root of 231132311 is about 613.6963692019.

Adding to 231132311 its reverse (113231132), we get a palindrome (344363443).

The spelling of 231132311 in words is "two hundred thirty-one million, one hundred thirty-two thousand, three hundred eleven".