3204221721156 has 27 divisors (see below), whose sum is σ = 8099587610751. Its totient is φ = 1068070326984.

The previous prime is 3204221721143. The next prime is 3204221721241. The reversal of 3204221721156 is 6511271224023.

The square root of 3204221721156 is 1790034.

It is a perfect power (a square), and thus also a powerful number.

3204221721156 is a `hidden beast` number, since 3 + 2 + 0 + 422 + 17 + 211 + 5 + 6 = 666.

3204221721156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3204221721156.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10591035 + ... + 10889373.

Almost surely, 2^{3204221721156} is an apocalyptic number.

3204221721156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

3204221721156 is the 1790034-th square number.

It is an amenable number.

3204221721156 is an abundant number, since it is smaller than the sum of its proper divisors (4895365889595).

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

3204221721156 is an frugal number, since it uses more digits than its factorization.

3204221721156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596688 (or 298344 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Multiplying 3204221721156 by its sum of digits (36), we get a square (115351981961616 = 10740204²).

3204221721156 divided by its sum of digits (36) gives a square (89006158921 = 298339²).

Adding to 3204221721156 its reverse (6511271224023), we get a palindrome (9715492945179).

The spelling of 3204221721156 in words is "three trillion, two hundred four billion, two hundred twenty-one million, seven hundred twenty-one thousand, one hundred fifty-six".