100055855 has 4 divisors (see below), whose sum is σ = 120067032. Its totient is φ = 80044680.

The previous prime is 100055821. The next prime is 100055869. The reversal of 100055855 is 558550001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100055855 - 2¹² = 100051759 is a prime.

It is a super-2 number, since 2×100055855² = 20022348239562050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10005581 + ... + 10005590.

It is an arithmetic number, because the mean of its divisors is an integer number (30016758).

Almost surely, 2^100055855 is an apocalyptic number.

100055855 is a deficient number, since it is larger than the sum of its proper divisors (20011177).

100055855 is an equidigital number, since it uses as much as digits as its factorization.

100055855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20011176.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 100055855 is about 10002.7923601362. The cubic root of 100055855 is about 464.2452859247.

The spelling of 100055855 in words is "one hundred million, fifty-five thousand, eight hundred fifty-five".