100043520 has 72 divisors (see below), whose sum is σ = 319526256. Its totient is φ = 26677248.

The previous prime is 100043519. The next prime is 100043539. The reversal of 100043520 is 25340001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100043520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9187 + ... + 16866.

Almost surely, 2^100043520 is an apocalyptic number.

100043520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100043520 is an abundant number, since it is smaller than the sum of its proper divisors (219482736).

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

100043520 is an equidigital number, since it uses as much as digits as its factorization.

100043520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26077 (or 26063 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 100043520 is about 10002.1757633027. The cubic root of 100043520 is about 464.2262075777.

Adding to 100043520 its reverse (25340001), we get a palindrome (125383521).

The spelling of 100043520 in words is "one hundred million, forty-three thousand, five hundred twenty".