2808157213 has 2 divisors, whose sum is σ = 2808157214. Its totient is φ = 2808157212.

The previous prime is 2808157207. The next prime is 2808157229. The reversal of 2808157213 is 3127518082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2053721124 + 754436089 = 45318^2 + 27467^2 .

It is a cyclic number.

It is not a de Polignac number, because 2808157213 - 2²⁵ = 2774602781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2808157243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404078606 + 1404078607.

It is an arithmetic number, because the mean of its divisors is an integer number (1404078607).

Almost surely, 2^2808157213 is an apocalyptic number.

It is an amenable number.

2808157213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2808157213 is an equidigital number, since it uses as much as digits as its factorization.

2808157213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 2808157213 is about 52992.0485827827. The cubic root of 2808157213 is about 1410.8271412280.

The spelling of 2808157213 in words is "two billion, eight hundred eight million, one hundred fifty-seven thousand, two hundred thirteen".