111864381 has 16 divisors (see below), whose sum is σ = 157233600. Its totient is φ = 70547328.

The previous prime is 111864317. The next prime is 111864383. The reversal of 111864381 is 183468111.

It is a happy number.

It is not a de Polignac number, because 111864381 - 2⁶ = 111864317 is a prime.

It is a super-2 number, since 2×111864381² = 25027279473026322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111864383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61635 + ... + 63423.

It is an arithmetic number, because the mean of its divisors is an integer number (9827100).

Almost surely, 2^111864381 is an apocalyptic number.

It is an amenable number.

111864381 is a deficient number, since it is larger than the sum of its proper divisors (45369219).

111864381 is a wasteful number, since it uses less digits than its factorization.

111864381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908.

The product of its digits is 4608, while the sum is 33.

The square root of 111864381 is about 10576.5959079469. The cubic root of 111864381 is about 481.8338140834.

The spelling of 111864381 in words is "one hundred eleven million, eight hundred sixty-four thousand, three hundred eighty-one".