3220711312 has 80 divisors (see below), whose sum is σ = 7695757440. Its totient is φ = 1271540736.

The previous prime is 3220711297. The next prime is 3220711313. The reversal of 3220711312 is 2131170223.

It is a happy number.

It is a super-2 number, since 2×3220711312² = 20745962710489522688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3220711313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817764 + ... + 821692.

It is an arithmetic number, because the mean of its divisors is an integer number (96196968).

Almost surely, 2^3220711312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3220711312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3847878720).

3220711312 is an abundant number, since it is smaller than the sum of its proper divisors (4475046128).

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

3220711312 is a wasteful number, since it uses less digits than its factorization.

3220711312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520 (or 4514 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 3220711312 is about 56751.3111037974. The cubic root of 3220711312 is about 1476.7849786620.

Adding to 3220711312 its reverse (2131170223), we get a palindrome (5351881535).

The spelling of 3220711312 in words is "three billion, two hundred twenty million, seven hundred eleven thousand, three hundred twelve".