3221313320 has 32 divisors (see below), whose sum is σ = 7263129600. Its totient is φ = 1285827648.

The previous prime is 3221313313. The next prime is 3221313331. The reversal of 3221313320 is 233131223.

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 = 3221313292 and 3221313301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64904 + ... + 103223.

It is an arithmetic number, because the mean of its divisors is an integer number (226972800).

Almost surely, 2^3221313320 is an apocalyptic number.

It is an amenable number.

3221313320 is an abundant number, since it is smaller than the sum of its proper divisors (4041816280).

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

3221313320 is a wasteful number, since it uses less digits than its factorization.

3221313320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168617 (or 168613 counting only the distinct ones).

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

The square root of 3221313320 is about 56756.6147686770. The cubic root of 3221313320 is about 1476.8769853544.

Adding to 3221313320 its reverse (233131223), we get a palindrome (3454444543).

The spelling of 3221313320 in words is "three billion, two hundred twenty-one million, three hundred thirteen thousand, three hundred twenty".