3220021356 has 48 divisors (see below), whose sum is σ = 7617469440. Its totient is φ = 1058503680.

The previous prime is 3220021349. The next prime is 3220021361. The reversal of 3220021356 is 6531200223.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152321 + ... + 1155111.

It is an arithmetic number, because the mean of its divisors is an integer number (158697280).

Almost surely, 2^3220021356 is an apocalyptic number.

It is an amenable number.

3220021356 is an abundant number, since it is smaller than the sum of its proper divisors (4397448084).

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

3220021356 is a wasteful number, since it uses less digits than its factorization.

3220021356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 3220021356 is about 56745.2320111567. The cubic root of 3220021356 is about 1476.6795165113.

Adding to 3220021356 its reverse (6531200223), we get a palindrome (9751221579).

The spelling of 3220021356 in words is "three billion, two hundred twenty million, twenty-one thousand, three hundred fifty-six".