100555998 has 16 divisors (see below), whose sum is σ = 202225296. Its totient is φ = 33333120.

The previous prime is 100555997. The next prime is 100556009. The reversal of 100555998 is 899555001.

It is a happy number.

It is a super-2 number, since 2×100555998² = 20223017467552008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555997) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 45211 + ... + 47382.

It is an arithmetic number, because the mean of its divisors is an integer number (12639081).

Almost surely, 2^100555998 is an apocalyptic number.

100555998 is an abundant number, since it is smaller than the sum of its proper divisors (101669298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100555998 is a wasteful number, since it uses less digits than its factorization.

100555998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92779.

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 100555998 is about 10027.7613653298. The cubic root of 100555998 is about 465.0175320017.

The spelling of 100555998 in words is "one hundred million, five hundred fifty-five thousand, nine hundred ninety-eight".