100860155 has 24 divisors (see below), whose sum is σ = 136164336. Its totient is φ = 71628480.

The previous prime is 100860139. The next prime is 100860157. The reversal of 100860155 is 551068001.

It is not a de Polignac number, because 100860155 - 2⁴ = 100860139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100860157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24077 + ... + 27953.

It is an arithmetic number, because the mean of its divisors is an integer number (5673514).

Almost surely, 2^100860155 is an apocalyptic number.

100860155 is a deficient number, since it is larger than the sum of its proper divisors (35304181).

100860155 is a wasteful number, since it uses less digits than its factorization.

100860155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 100860155 is about 10042.9156622965. The cubic root of 100860155 is about 465.4859143761.

The spelling of 100860155 in words is "one hundred million, eight hundred sixty thousand, one hundred fifty-five".