100043220 has 48 divisors (see below), whose sum is σ = 283510080. Its totient is φ = 26355456.

The previous prime is 100043201. The next prime is 100043221. The reversal of 100043220 is 22340001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100043196 and 100043205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100043221) 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, 5065 + ... + 15024.

It is an arithmetic number, because the mean of its divisors is an integer number (5906460).

Almost surely, 2^100043220 is an apocalyptic number.

100043220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100043220 is an abundant number, since it is smaller than the sum of its proper divisors (183466860).

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

100043220 is a wasteful number, since it uses less digits than its factorization.

100043220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20184 (or 20182 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 100043220 is about 10002.1607665544. The cubic root of 100043220 is about 464.2257435530.

Adding to 100043220 its reverse (22340001), we get a palindrome (122383221).

The spelling of 100043220 in words is "one hundred million, forty-three thousand, two hundred twenty".