117555111 has 16 divisors (see below), whose sum is σ = 175230720. Its totient is φ = 77886360.

The previous prime is 117555107. The next prime is 117555127. The reversal of 117555111 is 111555711.

It is a happy number.

It is not a de Polignac number, because 117555111 - 2² = 117555107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117555181) 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, 8955 + ... + 17756.

It is an arithmetic number, because the mean of its divisors is an integer number (10951920).

Almost surely, 2^117555111 is an apocalyptic number.

117555111 is a deficient number, since it is larger than the sum of its proper divisors (57675609).

117555111 is a wasteful number, since it uses less digits than its factorization.

117555111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26883 (or 26877 counting only the distinct ones).

The product of its digits is 875, while the sum is 27.

The square root of 117555111 is about 10842.2834772017. The cubic root of 117555111 is about 489.8696182328.

The spelling of 117555111 in words is "one hundred seventeen million, five hundred fifty-five thousand, one hundred eleven".