2811315809 has 2 divisors, whose sum is σ = 2811315810. Its totient is φ = 2811315808.

The previous prime is 2811315797. The next prime is 2811315827. The reversal of 2811315809 is 9085131182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2410515409 + 400800400 = 49097^2 + 20020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2811315809 - 2²⁰ = 2810267233 is a prime.

It is not a weakly prime, because it can be changed into another prime (2811315869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1405657904 + 1405657905.

It is an arithmetic number, because the mean of its divisors is an integer number (1405657905).

Almost surely, 2^2811315809 is an apocalyptic number.

It is an amenable number.

2811315809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811315809 is an equidigital number, since it uses as much as digits as its factorization.

2811315809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 2811315809 is about 53021.8427537180. The cubic root of 2811315809 is about 1411.3559059291.

The spelling of 2811315809 in words is "two billion, eight hundred eleven million, three hundred fifteen thousand, eight hundred nine".