10003220 has 24 divisors (see below), whose sum is σ = 21405384. Its totient is φ = 3925376.

The previous prime is 10003199. The next prime is 10003223. The reversal of 10003220 is 2230001.

It can be written as a sum of positive squares in 4 ways, for example, as 2062096 + 7941124 = 1436^2 + 2818^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10003198 and 10003207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3659 + ... + 5778.

It is an arithmetic number, because the mean of its divisors is an integer number (891891).

Almost surely, 2^10003220 is an apocalyptic number.

10003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10003220 is an abundant number, since it is smaller than the sum of its proper divisors (11402164).

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

10003220 is a wasteful number, since it uses less digits than its factorization.

10003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499 (or 9497 counting only the distinct ones).

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

The square root of 10003220 is about 3162.7867458936. The cubic root of 10003220 is about 215.4665907873.

Adding to 10003220 its reverse (2230001), we get a palindrome (12233221).

The spelling of 10003220 in words is "ten million, three thousand, two hundred twenty".