1001812200 has 48 divisors (see below), whose sum is σ = 3105619680. Its totient is φ = 267149760.

The previous prime is 1001812199. The next prime is 1001812223. The reversal of 1001812200 is 22181001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1001812200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 834244 + ... + 835443.

It is an arithmetic number, because the mean of its divisors is an integer number (64700410).

Almost surely, 2^1001812200 is an apocalyptic number.

1001812200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001812200 is an abundant number, since it is smaller than the sum of its proper divisors (2103807480).

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

1001812200 is a wasteful number, since it uses less digits than its factorization.

1001812200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669706 (or 1669697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1001812200 is about 31651.4170298898. The cubic root of 1001812200 is about 1000.6037021371.

Adding to 1001812200 its reverse (22181001), we get a palindrome (1023993201).

The spelling of 1001812200 in words is "one billion, one million, eight hundred twelve thousand, two hundred".