116531231 has 2 divisors, whose sum is σ = 116531232. Its totient is φ = 116531230.

The previous prime is 116531203. The next prime is 116531267. The reversal of 116531231 is 132135611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 116531231 - 2¹⁴ = 116514847 is a prime.

It is a super-2 number, since 2×116531231² = 27159055596750722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 116531197 and 116531206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116531281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58265615 + 58265616.

It is an arithmetic number, because the mean of its divisors is an integer number (58265616).

Almost surely, 2^116531231 is an apocalyptic number.

116531231 is a deficient number, since it is larger than the sum of its proper divisors (1).

116531231 is an equidigital number, since it uses as much as digits as its factorization.

116531231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 116531231 is about 10794.9632236520. The cubic root of 116531231 is about 488.4432490164.

Adding to 116531231 its reverse (132135611), we get a palindrome (248666842).

The spelling of 116531231 in words is "one hundred sixteen million, five hundred thirty-one thousand, two hundred thirty-one".