100550000 has 60 divisors (see below), whose sum is σ = 243625032. Its totient is φ = 40200000.

The previous prime is 100549991. The next prime is 100550003. The reversal of 100550000 is 55001.

It is a super-2 number, since 2×100550000² = 20220605000000000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (11) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100550003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48995 + ... + 51005.

Almost surely, 2^100550000 is an apocalyptic number.

100550000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121812516).

100550000 is an abundant number, since it is smaller than the sum of its proper divisors (143075032).

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

100550000 is an frugal number, since it uses more digits than its factorization.

100550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 100550000 is about 10027.4622911283. The cubic root of 100550000 is about 465.0082859741.

The spelling of 100550000 in words is "one hundred million, five hundred fifty thousand".