3221000520 has 32 divisors (see below), whose sum is σ = 9663001920. Its totient is φ = 858933440.

The previous prime is 3221000501. The next prime is 3221000537. The reversal of 3221000520 is 250001223.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3221000520.

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, 13420716 + ... + 13420955.

It is an arithmetic number, because the mean of its divisors is an integer number (301968810).

Almost surely, 2^3221000520 is an apocalyptic number.

3221000520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3221000520 is an abundant number, since it is smaller than the sum of its proper divisors (6442001400).

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

3221000520 is a wasteful number, since it uses less digits than its factorization.

3221000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26841685 (or 26841681 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3221000520 is about 56753.8590758373. The cubic root of 3221000520 is about 1476.8291806208.

Adding to 3221000520 its reverse (250001223), we get a palindrome (3471001743).

The spelling of 3221000520 in words is "three billion, two hundred twenty-one million, five hundred twenty", and thus it is an aban number.