111665513 has 2 divisors, whose sum is σ = 111665514. Its totient is φ = 111665512.

The previous prime is 111665507. The next prime is 111665551. The reversal of 111665513 is 315566111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105842944 + 5822569 = 10288^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 111665513 - 2²⁰ = 110616937 is a prime.

It is not a weakly prime, because it can be changed into another prime (111664513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55832756 + 55832757.

It is an arithmetic number, because the mean of its divisors is an integer number (55832757).

Almost surely, 2^111665513 is an apocalyptic number.

It is an amenable number.

111665513 is a deficient number, since it is larger than the sum of its proper divisors (1).

111665513 is an equidigital number, since it uses as much as digits as its factorization.

111665513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

The square root of 111665513 is about 10567.1904023728. The cubic root of 111665513 is about 481.5481164536.

The spelling of 111665513 in words is "one hundred eleven million, six hundred sixty-five thousand, five hundred thirteen".