3273065721 has 12 divisors (see below), whose sum is σ = 4816965348. Its totient is φ = 2140872864.

The previous prime is 3273065713. The next prime is 3273065729. The reversal of 3273065721 is 1275603723.

3273065721 is a `hidden beast` number, since 327 + 306 + 5 + 7 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (3273065713) and next prime (3273065729).

It can be written as a sum of positive squares in 2 ways, for example, as 1707755625 + 1565310096 = 41325^2 + 39564^2 .

It is not a de Polignac number, because 3273065721 - 2³ = 3273065713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3273065729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3430410 + ... + 3431363.

It is an arithmetic number, because the mean of its divisors is an integer number (401413779).

Almost surely, 2^3273065721 is an apocalyptic number.

It is an amenable number.

3273065721 is a deficient number, since it is larger than the sum of its proper divisors (1543899627).

3273065721 is a wasteful number, since it uses less digits than its factorization.

3273065721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861832 (or 6861829 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 3273065721 is about 57210.7133411217. The cubic root of 3273065721 is about 1484.7439874276.

The spelling of 3273065721 in words is "three billion, two hundred seventy-three million, sixty-five thousand, seven hundred twenty-one".