100003220 has 12 divisors (see below), whose sum is σ = 210006804. Its totient is φ = 40001280.

The previous prime is 100003219. The next prime is 100003243. The reversal of 100003220 is 22300001.

It can be written as a sum of positive squares in 2 ways, for example, as 30980356 + 69022864 = 5566^2 + 8308^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100003198 and 100003207.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2500061 + ... + 2500100.

It is an arithmetic number, because the mean of its divisors is an integer number (17500567).

Almost surely, 2^100003220 is an apocalyptic number.

100003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100003220 is an abundant number, since it is smaller than the sum of its proper divisors (110003584).

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

100003220 is a wasteful number, since it uses less digits than its factorization.

100003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000170 (or 5000168 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 100003220 is about 10000.1609987040. The cubic root of 100003220 is about 464.1638652798.

Adding to 100003220 its reverse (22300001), we get a palindrome (122303221).

The spelling of 100003220 in words is "one hundred million, three thousand, two hundred twenty".