100155885 has 16 divisors (see below), whose sum is σ = 165419520. Its totient is φ = 51693120.

The previous prime is 100155877. The next prime is 100155889. The reversal of 100155885 is 588551001.

It is not a de Polignac number, because 100155885 - 2³ = 100155877 is a prime.

It is a super-3 number, since 3×100155885³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100155889) 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, 107230 + ... + 108159.

It is an arithmetic number, because the mean of its divisors is an integer number (10338720).

Almost surely, 2^100155885 is an apocalyptic number.

100155885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100155885 is a deficient number, since it is larger than the sum of its proper divisors (65263635).

100155885 is a wasteful number, since it uses less digits than its factorization.

100155885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215428.

The product of its (nonzero) digits is 8000, while the sum is 33.

The square root of 100155885 is about 10007.7912148486. The cubic root of 100155885 is about 464.3999428379.

The spelling of 100155885 in words is "one hundred million, one hundred fifty-five thousand, eight hundred eighty-five".