6813754221 has 8 divisors (see below), whose sum is σ = 9154357344. Its totient is φ = 4507826960.

The previous prime is 6813754219. The next prime is 6813754261. The reversal of 6813754221 is 1224573186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6813754221 - 2¹ = 6813754219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6813754221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6813754201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8668506 + ... + 8669291.

It is an arithmetic number, because the mean of its divisors is an integer number (1144294668).

Almost surely, 2^6813754221 is an apocalyptic number.

It is an amenable number.

6813754221 is a deficient number, since it is larger than the sum of its proper divisors (2340603123).

6813754221 is a wasteful number, since it uses less digits than its factorization.

6813754221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17337931.

The product of its digits is 80640, while the sum is 39.

The square root of 6813754221 is about 82545.4675981668. The cubic root of 6813754221 is about 1895.8129608506.

The spelling of 6813754221 in words is "six billion, eight hundred thirteen million, seven hundred fifty-four thousand, two hundred twenty-one".