111865916 has 12 divisors (see below), whose sum is σ = 207281088. Its totient is φ = 52642752.

The previous prime is 111865913. The next prime is 111865921. The reversal of 111865916 is 619568111.

It is a self number, because there is not a number n which added to its sum of digits gives 111865916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111865913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822476 + ... + 822611.

It is an arithmetic number, because the mean of its divisors is an integer number (17273424).

Almost surely, 2^111865916 is an apocalyptic number.

It is an amenable number.

111865916 is a deficient number, since it is larger than the sum of its proper divisors (95415172).

111865916 is a wasteful number, since it uses less digits than its factorization.

111865916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645108 (or 1645106 counting only the distinct ones).

The product of its digits is 12960, while the sum is 38.

The square root of 111865916 is about 10576.6684735790. The cubic root of 111865916 is about 481.8360179768.

The spelling of 111865916 in words is "one hundred eleven million, eight hundred sixty-five thousand, nine hundred sixteen".