3573643221 has 12 divisors (see below), whose sum is σ = 5202575872. Its totient is φ = 2363668776.

The previous prime is 3573643217. The next prime is 3573643223. The reversal of 3573643221 is 1223463753.

3573643221 is a `hidden beast` number, since 3 + 5 + 7 + 3 + 643 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 3573643221 - 2² = 3573643217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3573643223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1562131 + ... + 1564416.

Almost surely, 2^3573643221 is an apocalyptic number.

It is an amenable number.

3573643221 is a deficient number, since it is larger than the sum of its proper divisors (1628932651).

3573643221 is a wasteful number, since it uses less digits than its factorization.

3573643221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126680 (or 3126677 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 3573643221 is about 59779.9566828214. The cubic root of 3573643221 is about 1528.8694313546.

The spelling of 3573643221 in words is "three billion, five hundred seventy-three million, six hundred forty-three thousand, two hundred twenty-one".