116531111 has 2 divisors, whose sum is σ = 116531112. Its totient is φ = 116531110.

The previous prime is 116531101. The next prime is 116531113. The reversal of 116531111 is 111135611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116531111 is a prime.

Together with 116531113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116531113) 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 as a sum of consecutive naturals, namely, 58265555 + 58265556.

It is an arithmetic number, because the mean of its divisors is an integer number (58265556).

Almost surely, 2^116531111 is an apocalyptic number.

116531111 is a deficient number, since it is larger than the sum of its proper divisors (1).

116531111 is an equidigital number, since it uses as much as digits as its factorization.

116531111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90, while the sum is 20.

The square root of 116531111 is about 10794.9576655029. The cubic root of 116531111 is about 488.4430813555.

Adding to 116531111 its reverse (111135611), we get a palindrome (227666722).

The spelling of 116531111 in words is "one hundred sixteen million, five hundred thirty-one thousand, one hundred eleven".