3221563988 has 12 divisors (see below), whose sum is σ = 5969368692. Its totient is φ = 1516030080.

The previous prime is 3221563987. The next prime is 3221564009. The reversal of 3221563988 is 8893651223.

It can be written as a sum of positive squares in 2 ways, for example, as 1716279184 + 1505284804 = 41428^2 + 38798^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221563987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23687903 + ... + 23688038.

It is an arithmetic number, because the mean of its divisors is an integer number (497447391).

Almost surely, 2^3221563988 is an apocalyptic number.

It is an amenable number.

3221563988 is a deficient number, since it is larger than the sum of its proper divisors (2747804704).

3221563988 is a wasteful number, since it uses less digits than its factorization.

3221563988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47375962 (or 47375960 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 3221563988 is about 56758.8229969579. The cubic root of 3221563988 is about 1476.9152923181.

The spelling of 3221563988 in words is "three billion, two hundred twenty-one million, five hundred sixty-three thousand, nine hundred eighty-eight".