3331213220 has 12 divisors (see below), whose sum is σ = 6995547804. Its totient is φ = 1332485280.

The previous prime is 3331213213. The next prime is 3331213229. The reversal of 3331213220 is 223121333.

It can be written as a sum of positive squares in 2 ways, for example, as 1532096164 + 1799117056 = 39142^2 + 42416^2 .

It is a super-2 number, since 2×3331213220² = 22193963034205536800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 166560661 = 3331213220 / (3 + 3 + 3 + 1 + 2 + 1 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 3331213192 and 3331213201.

It is not an unprimeable number, because it can be changed into a prime (3331213229) 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, 83280311 + ... + 83280350.

It is an arithmetic number, because the mean of its divisors is an integer number (582962317).

Almost surely, 2^3331213220 is an apocalyptic number.

It is an amenable number.

3331213220 is an abundant number, since it is smaller than the sum of its proper divisors (3664334584).

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

3331213220 is a wasteful number, since it uses less digits than its factorization.

3331213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166560670 (or 166560668 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 3331213220 is about 57716.6632784675. The cubic root of 3331213220 is about 1493.4848121522.

Adding to 3331213220 its reverse (223121333), we get a palindrome (3554334553).

The spelling of 3331213220 in words is "three billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred twenty".