2808218473 has 2 divisors, whose sum is σ = 2808218474. Its totient is φ = 2808218472.

The previous prime is 2808218417. The next prime is 2808218533. The reversal of 2808218473 is 3748128082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2039154649 + 769063824 = 45157^2 + 27732^2 .

It is a cyclic number.

It is not a de Polignac number, because 2808218473 - 2¹³ = 2808210281 is a prime.

It is not a weakly prime, because it can be changed into another prime (2808618473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404109236 + 1404109237.

It is an arithmetic number, because the mean of its divisors is an integer number (1404109237).

Almost surely, 2^2808218473 is an apocalyptic number.

It is an amenable number.

2808218473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2808218473 is an equidigital number, since it uses as much as digits as its factorization.

2808218473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 2808218473 is about 52992.6265908758. The cubic root of 2808218473 is about 1410.8374002266.

The spelling of 2808218473 in words is "two billion, eight hundred eight million, two hundred eighteen thousand, four hundred seventy-three".