3221320020 has 48 divisors (see below), whose sum is σ = 9024812160. Its totient is φ = 858531456.

The previous prime is 3221320009. The next prime is 3221320027. The reversal of 3221320020 is 200231223.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221320027) 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, 98454 + ... + 127026.

It is an arithmetic number, because the mean of its divisors is an integer number (188016920).

Almost surely, 2^3221320020 is an apocalyptic number.

3221320020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3221320020 is an abundant number, since it is smaller than the sum of its proper divisors (5803492140).

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

3221320020 is a wasteful number, since it uses less digits than its factorization.

3221320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30464 (or 30462 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3221320020 is about 56756.6737926035. The cubic root of 3221320020 is about 1476.8780092710.

Adding to 3221320020 its reverse (200231223), we get a palindrome (3421551243).

The spelling of 3221320020 in words is "three billion, two hundred twenty-one million, three hundred twenty thousand, twenty".