100155872 has 24 divisors (see below), whose sum is σ = 201380256. Its totient is φ = 49011712.

The previous prime is 100155829. The next prime is 100155877. The reversal of 100155872 is 278551001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100155877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31793 + ... + 34800.

It is an arithmetic number, because the mean of its divisors is an integer number (8390844).

Almost surely, 2^100155872 is an apocalyptic number.

It is an amenable number.

100155872 is an abundant number, since it is smaller than the sum of its proper divisors (101224384).

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

100155872 is an equidigital number, since it uses as much as digits as its factorization.

100155872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66650 (or 66642 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 100155872 is about 10007.7905653546. The cubic root of 100155872 is about 464.3999227452.

The spelling of 100155872 in words is "one hundred million, one hundred fifty-five thousand, eight hundred seventy-two".