100555117 has 4 divisors (see below), whose sum is σ = 108290140. Its totient is φ = 92820096.

The previous prime is 100555097. The next prime is 100555177. The reversal of 100555117 is 711555001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711555001 = 317 ⋅2244653.

It can be written as a sum of positive squares in 2 ways, for example, as 7123561 + 93431556 = 2669^2 + 9666^2 .

It is a cyclic number.

It is not a de Polignac number, because 100555117 - 2¹⁵ = 100522349 is a prime.

It is a super-2 number, since 2×100555117² = 20222663109767378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100555091 and 100555100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555177) 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, 3867492 + ... + 3867517.

It is an arithmetic number, because the mean of its divisors is an integer number (27072535).

Almost surely, 2^100555117 is an apocalyptic number.

It is an amenable number.

100555117 is a deficient number, since it is larger than the sum of its proper divisors (7735023).

100555117 is an equidigital number, since it uses as much as digits as its factorization.

100555117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735022.

The product of its (nonzero) digits is 875, while the sum is 25.

The square root of 100555117 is about 10027.7174371838. The cubic root of 100555117 is about 465.0161739470.

The spelling of 100555117 in words is "one hundred million, five hundred fifty-five thousand, one hundred seventeen".