111391855 has 8 divisors (see below), whose sum is σ = 135665712. Its totient is φ = 87783168.

The previous prime is 111391853. The next prime is 111391859. The reversal of 111391855 is 558193111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111391855 - 2¹ = 111391853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111391855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111391853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165922 + ... + 166591.

It is an arithmetic number, because the mean of its divisors is an integer number (16958214).

Almost surely, 2^111391855 is an apocalyptic number.

111391855 is a deficient number, since it is larger than the sum of its proper divisors (24273857).

111391855 is an equidigital number, since it uses as much as digits as its factorization.

111391855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332585.

The product of its digits is 5400, while the sum is 34.

The square root of 111391855 is about 10554.2339845201. The cubic root of 111391855 is about 481.1544189782.

The spelling of 111391855 in words is "one hundred eleven million, three hundred ninety-one thousand, eight hundred fifty-five".