2311013287 has 4 divisors (see below), whose sum is σ = 2521105416. Its totient is φ = 2100921160.

The previous prime is 2311013279. The next prime is 2311013311. The reversal of 2311013287 is 7823101132.

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 2311013287 - 2³ = 2311013279 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 (2311013267) 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, 105046048 + ... + 105046069.

It is an arithmetic number, because the mean of its divisors is an integer number (630276354).

Almost surely, 2^2311013287 is an apocalyptic number.

2311013287 is a deficient number, since it is larger than the sum of its proper divisors (210092129).

2311013287 is a wasteful number, since it uses less digits than its factorization.

2311013287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210092128.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2311013287 is about 48072.9995631644. Note that the first 3 decimals coincide. The cubic root of 2311013287 is about 1322.1096672892.

The spelling of 2311013287 in words is "two billion, three hundred eleven million, thirteen thousand, two hundred eighty-seven".