2811315889 has 4 divisors (see below), whose sum is σ = 2812471924. Its totient is φ = 2810159856.

The previous prime is 2811315869. The next prime is 2811315917. The reversal of 2811315889 is 9885131182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9885131182 = 2 ⋅4942565591.

It can be written as a sum of positive squares in 2 ways, for example, as 2762553600 + 48762289 = 52560^2 + 6983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2811315889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2811315809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574362 + ... + 579235.

It is an arithmetic number, because the mean of its divisors is an integer number (703117981).

Almost surely, 2^2811315889 is an apocalyptic number.

It is an amenable number.

2811315889 is a deficient number, since it is larger than the sum of its proper divisors (1156035).

2811315889 is a wasteful number, since it uses less digits than its factorization.

2811315889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156034.

The product of its digits is 138240, while the sum is 46.

The square root of 2811315889 is about 53021.8435081241. The cubic root of 2811315889 is about 1411.3559193165.

The spelling of 2811315889 in words is "two billion, eight hundred eleven million, three hundred fifteen thousand, eight hundred eighty-nine".