111612313 has 4 divisors (see below), whose sum is σ = 114628900. Its totient is φ = 108595728.

The previous prime is 111612301. The next prime is 111612331. The reversal of 111612313 is 313216111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313216111 = 13 ⋅24093547.

It can be written as a sum of positive squares in 2 ways, for example, as 101062809 + 10549504 = 10053^2 + 3248^2 .

It is a cyclic number.

It is not a de Polignac number, because 111612313 - 2¹³ = 111604121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111612343) 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, 1508238 + ... + 1508311.

It is an arithmetic number, because the mean of its divisors is an integer number (28657225).

Almost surely, 2^111612313 is an apocalyptic number.

It is an amenable number.

111612313 is a deficient number, since it is larger than the sum of its proper divisors (3016587).

111612313 is an equidigital number, since it uses as much as digits as its factorization.

111612313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016586.

The product of its digits is 108, while the sum is 19.

The square root of 111612313 is about 10564.6728770937. The cubic root of 111612313 is about 481.4716307999.

Adding to 111612313 its reverse (313216111), we get a palindrome (424828424).

The spelling of 111612313 in words is "one hundred eleven million, six hundred twelve thousand, three hundred thirteen".