100155020 has 36 divisors (see below), whose sum is σ = 244666800. Its totient is φ = 34338528.

The previous prime is 100154987. The next prime is 100155031. The reversal of 100155020 is 20551001.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 100154986 and 100155004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50120 + ... + 52079.

It is an arithmetic number, because the mean of its divisors is an integer number (6796300).

Almost surely, 2^100155020 is an apocalyptic number.

100155020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100155020 is an abundant number, since it is smaller than the sum of its proper divisors (144511780).

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

100155020 is a wasteful number, since it uses less digits than its factorization.

100155020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102222 (or 102213 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 100155020 is about 10007.7479984260. The cubic root of 100155020 is about 464.3986058983.

The spelling of 100155020 in words is "one hundred million, one hundred fifty-five thousand, twenty".