100143220 has 24 divisors (see below), whose sum is σ = 211567104. Its totient is φ = 39816096.

The previous prime is 100143191. The next prime is 100143223. The reversal of 100143220 is 22341001.

It is a self number, because there is not a number n which added to its sum of digits gives 100143220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100143223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11652 + ... + 18331.

It is an arithmetic number, because the mean of its divisors is an integer number (8815296).

Almost surely, 2^100143220 is an apocalyptic number.

100143220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100143220 is an abundant number, since it is smaller than the sum of its proper divisors (111423884).

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

100143220 is a wasteful number, since it uses less digits than its factorization.

100143220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30159 (or 30157 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 100143220 is about 10007.1584378384. The cubic root of 100143220 is about 464.3803671095.

Adding to 100143220 its reverse (22341001), we get a palindrome (122484221).

The spelling of 100143220 in words is "one hundred million, one hundred forty-three thousand, two hundred twenty".