2731328291 has 4 divisors (see below), whose sum is σ = 2732494392. Its totient is φ = 2730162192.

The previous prime is 2731328279. The next prime is 2731328297. The reversal of 2731328291 is 1928231372.

It is a happy number.

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 2731328291 - 2¹⁴ = 2731311907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2731328297) 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, 579530 + ... + 584223.

It is an arithmetic number, because the mean of its divisors is an integer number (683123598).

Almost surely, 2^2731328291 is an apocalyptic number.

2731328291 is a deficient number, since it is larger than the sum of its proper divisors (1166101).

2731328291 is a wasteful number, since it uses less digits than its factorization.

2731328291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166100.

The product of its digits is 36288, while the sum is 38.

The square root of 2731328291 is about 52262.1114288353. Note that the first 3 decimals coincide. The cubic root of 2731328291 is about 1397.8416215895.

The spelling of 2731328291 in words is "two billion, seven hundred thirty-one million, three hundred twenty-eight thousand, two hundred ninety-one".