100810205 has 4 divisors (see below), whose sum is σ = 120972252. Its totient is φ = 80648160.

The previous prime is 100810201. The next prime is 100810207. The reversal of 100810205 is 502018001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502018001 = 317 ⋅1583653.

It can be written as a sum of positive squares in 2 ways, for example, as 62047129 + 38763076 = 7877^2 + 6226^2 .

It is not a de Polignac number, because 100810205 - 2² = 100810201 is a prime.

It is a super-3 number, since 3×100810205³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100810201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10081016 + ... + 10081025.

It is an arithmetic number, because the mean of its divisors is an integer number (30243063).

Almost surely, 2^100810205 is an apocalyptic number.

It is an amenable number.

100810205 is a deficient number, since it is larger than the sum of its proper divisors (20162047).

100810205 is an equidigital number, since it uses as much as digits as its factorization.

100810205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20162046.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 100810205 is about 10040.4285267114. The cubic root of 100810205 is about 465.4090592468.

Adding to 100810205 its reverse (502018001), we get a palindrome (602828206).

The spelling of 100810205 in words is "one hundred million, eight hundred ten thousand, two hundred five".