2685311287 has 4 divisors (see below), whose sum is σ = 2826643480. Its totient is φ = 2543979096.

The previous prime is 2685311243. The next prime is 2685311323. The reversal of 2685311287 is 7821135862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2685311287 - 2⁷ = 2685311159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685311887) 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, 70666068 + ... + 70666105.

It is an arithmetic number, because the mean of its divisors is an integer number (706660870).

Almost surely, 2^2685311287 is an apocalyptic number.

2685311287 is a deficient number, since it is larger than the sum of its proper divisors (141332193).

2685311287 is a wasteful number, since it uses less digits than its factorization.

2685311287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141332192.

The product of its digits is 161280, while the sum is 43.

The square root of 2685311287 is about 51819.9892609020. The cubic root of 2685311287 is about 1389.9469101404.

The spelling of 2685311287 in words is "two billion, six hundred eighty-five million, three hundred eleven thousand, two hundred eighty-seven".