100520000172 has 36 divisors (see below), whose sum is σ = 254113066480. Its totient is φ = 33503918112.

The previous prime is 100520000149. The next prime is 100520000209. The reversal of 100520000172 is 271000025001.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357018 + ... + 573150.

Almost surely, 2^100520000172 is an apocalyptic number.

100520000172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100520000172 is an abundant number, since it is smaller than the sum of its proper divisors (153593066308).

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

100520000172 is a wasteful number, since it uses less digits than its factorization.

100520000172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229062 (or 229057 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

Adding to 100520000172 its reverse (271000025001), we get a palindrome (371520025173).

The spelling of 100520000172 in words is "one hundred billion, five hundred twenty million, one hundred seventy-two", and thus it is an aban number.