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100255 = 520051

100255 has 4 divisors (see below), whose sum is σ = 120312. Its totient is φ = 80200.

The previous prime is 100237. The next prime is 100267. The reversal of 100255 is 552001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100255 - 211 = 98207 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10021 + ... + 10030.

It is an arithmetic number, because the mean of its divisors is an integer number (30078).

100255 is a Friedman number, since it can be written as 20051*5, using all its digits and the basic arithmetic operations.

2100255 is an apocalyptic number.

100255 is a deficient number, since it is larger than the sum of its proper divisors (20057).

100255 is an equidigital number, since it uses as much as digits as its factorization.

100255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20056.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 100255 is about 316.6306997118. The cubic root of 100255 is about 46.4553083532.

Adding to 100255 its reverse (552001), we get a palindrome (652256).

The spelling of 100255 in words is "one hundred thousand, two hundred fifty-five".

Divisors: 1 5 20051 100255