2973813221 has 16 divisors (see below), whose sum is σ = 3180777600. Its totient is φ = 2773552320.

The previous prime is 2973813211. The next prime is 2973813223. The reversal of 2973813221 is 1223183792.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2973813221 - 2¹⁰ = 2973812197 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 (2973813223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651455 + ... + 656003.

It is an arithmetic number, because the mean of its divisors is an integer number (198798600).

Almost surely, 2^2973813221 is an apocalyptic number.

It is an amenable number.

2973813221 is a deficient number, since it is larger than the sum of its proper divisors (206964379).

2973813221 is a wasteful number, since it uses less digits than its factorization.

2973813221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276.

The product of its digits is 36288, while the sum is 38.

The square root of 2973813221 is about 54532.6803027322. The cubic root of 2973813221 is about 1438.0408705547.

The spelling of 2973813221 in words is "two billion, nine hundred seventy-three million, eight hundred thirteen thousand, two hundred twenty-one".