100078155 has 24 divisors (see below), whose sum is σ = 178160112. Its totient is φ = 51931584.

The previous prime is 100078141. The next prime is 100078169. The reversal of 100078155 is 551870001.

It is an interprime number because it is at equal distance from previous prime (100078141) and next prime (100078169).

It is not a de Polignac number, because 100078155 - 2¹⁷ = 99947083 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28389 + ... + 31718.

It is an arithmetic number, because the mean of its divisors is an integer number (7423338).

Almost surely, 2^100078155 is an apocalyptic number.

100078155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100078155 is a deficient number, since it is larger than the sum of its proper divisors (78081957).

100078155 is a wasteful number, since it uses less digits than its factorization.

100078155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60155 (or 60152 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 100078155 is about 10003.9069867727. The cubic root of 100078155 is about 464.2797729981.

The spelling of 100078155 in words is "one hundred million, seventy-eight thousand, one hundred fifty-five".