3221561204 has 24 divisors (see below), whose sum is σ = 5771673600. Its totient is φ = 1572548544.

The previous prime is 3221561191. The next prime is 3221561209. The reversal of 3221561204 is 4021651223.

It is a happy number.

It is a super-2 number, since 2×3221561204² = 20756913182235859232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221561209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521357 + ... + 527499.

It is an arithmetic number, because the mean of its divisors is an integer number (240486400).

Almost surely, 2^3221561204 is an apocalyptic number.

It is an amenable number.

3221561204 is a deficient number, since it is larger than the sum of its proper divisors (2550112396).

3221561204 is a wasteful number, since it uses less digits than its factorization.

3221561204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239 (or 9237 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 3221561204 is about 56758.7984721312. The cubic root of 3221561204 is about 1476.9148668795.

The spelling of 3221561204 in words is "three billion, two hundred twenty-one million, five hundred sixty-one thousand, two hundred four".