100855531 has 8 divisors (see below), whose sum is σ = 118075104. Its totient is φ = 84338880.

The previous prime is 100855519. The next prime is 100855537. The reversal of 100855531 is 135558001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100855531 - 2⁵ = 100855499 is a prime.

It is a super-2 number, since 2×100855531² = 20343676266583922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100855531.

It is not an unprimeable number, because it can be changed into a prime (100855537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175420 + ... + 175993.

It is an arithmetic number, because the mean of its divisors is an integer number (14759388).

Almost surely, 2^100855531 is an apocalyptic number.

100855531 is a deficient number, since it is larger than the sum of its proper divisors (17219573).

100855531 is an equidigital number, since it uses as much as digits as its factorization.

100855531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351461.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 100855531 is about 10042.6854476280. The cubic root of 100855531 is about 465.4788007650.

Subtracting from 100855531 its sum of digits (28), we obtain a triangular number (100855503 = T₁₄₂₀₂).

The spelling of 100855531 in words is "one hundred million, eight hundred fifty-five thousand, five hundred thirty-one".