100556203 has 6 divisors (see below), whose sum is σ = 110528852. Its totient is φ = 91414620.

The previous prime is 100556191. The next prime is 100556249. The reversal of 100556203 is 302655001.

It is a happy number.

It is not a de Polignac number, because 100556203 - 2¹³ = 100548011 is a prime.

It is a super-3 number, since 3×100556203³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100556503) 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 5 ways as a sum of consecutive naturals, for example, 415401 + ... + 415642.

Almost surely, 2^100556203 is an apocalyptic number.

100556203 is a deficient number, since it is larger than the sum of its proper divisors (9972649).

100556203 is an equidigital number, since it uses as much as digits as its factorization.

100556203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831065 (or 831054 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 100556203 is about 10027.7715869479. The cubic root of 100556203 is about 465.0178480065.

The spelling of 100556203 in words is "one hundred million, five hundred fifty-six thousand, two hundred three".