100225818 has 48 divisors (see below), whose sum is σ = 270743616. Its totient is φ = 26032320.

The previous prime is 100225793. The next prime is 100225831. The reversal of 100225818 is 818522001.

It is a junction number, because it is equal to n+sod(n) for n = 100225791 and 100225800.

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, 34771 + ... + 37542.

It is an arithmetic number, because the mean of its divisors is an integer number (5640492).

Almost surely, 2^100225818 is an apocalyptic number.

100225818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

100225818 is an abundant number, since it is smaller than the sum of its proper divisors (170517798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100225818 is a wasteful number, since it uses less digits than its factorization.

100225818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72339 (or 72336 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 100225818 is about 10011.2845329658. The cubic root of 100225818 is about 464.5080054686.

Adding to 100225818 its reverse (818522001), we get a palindrome (918747819).

The spelling of 100225818 in words is "one hundred million, two hundred twenty-five thousand, eight hundred eighteen".