3213331220 has 24 divisors (see below), whose sum is σ = 7361450208. Its totient is φ = 1168484000.

The previous prime is 3213331213. The next prime is 3213331229. The reversal of 3213331220 is 221333123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3213331192 and 3213331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213331229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7302806 + ... + 7303245.

It is an arithmetic number, because the mean of its divisors is an integer number (306727092).

Almost surely, 2^3213331220 is an apocalyptic number.

It is an amenable number.

3213331220 is an abundant number, since it is smaller than the sum of its proper divisors (4148118988).

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

3213331220 is a wasteful number, since it uses less digits than its factorization.

3213331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14606071 (or 14606069 counting only the distinct ones).

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

The square root of 3213331220 is about 56686.2524780039. The cubic root of 3213331220 is about 1475.6561240656.

Adding to 3213331220 its reverse (221333123), we get a palindrome (3434664343).

It can be divided in two parts, 3213 and 331220, that added together give a palindrome (334433).

The spelling of 3213331220 in words is "three billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred twenty".