100555145 has 16 divisors (see below), whose sum is σ = 123087360. Its totient is φ = 78840000.

The previous prime is 100555097. The next prime is 100555177. The reversal of 100555145 is 541555001.

It is not a de Polignac number, because 100555145 - 2¹⁰ = 100554121 is a prime.

It is a super-2 number, since 2×100555145² = 20222674371942050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133520 + ... + 134270.

It is an arithmetic number, because the mean of its divisors is an integer number (7692960).

Almost surely, 2^100555145 is an apocalyptic number.

It is an amenable number.

100555145 is a deficient number, since it is larger than the sum of its proper divisors (22532215).

100555145 is an equidigital number, since it uses as much as digits as its factorization.

100555145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 100555145 is about 10027.7188333140. The cubic root of 100555145 is about 465.0162171089.

The spelling of 100555145 in words is "one hundred million, five hundred fifty-five thousand, one hundred forty-five".