116531321 has 4 divisors (see below), whose sum is σ = 116553552. Its totient is φ = 116509092.

The previous prime is 116531297. The next prime is 116531323. The reversal of 116531321 is 123135611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123135611 = 1103 ⋅111637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116531321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116531323) 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 in 3 ways as a sum of consecutive naturals, for example, 1586 + ... + 15348.

It is an arithmetic number, because the mean of its divisors is an integer number (29138388).

Almost surely, 2^116531321 is an apocalyptic number.

It is an amenable number.

116531321 is a deficient number, since it is larger than the sum of its proper divisors (22231).

116531321 is an equidigital number, since it uses as much as digits as its factorization.

116531321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22230.

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

The square root of 116531321 is about 10794.9673922620. The cubic root of 116531321 is about 488.4433747620.

Adding to 116531321 its reverse (123135611), we get a palindrome (239666932).

The spelling of 116531321 in words is "one hundred sixteen million, five hundred thirty-one thousand, three hundred twenty-one".