2318891231 has 4 divisors (see below), whose sum is σ = 2324247072. Its totient is φ = 2313535392.

The previous prime is 2318891207. The next prime is 2318891249. The reversal of 2318891231 is 1321988132.

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 2318891231 - 2⁶ = 2318891167 is a prime.

It is a super-2 number, since 2×2318891231² = 10754513082417390722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2318891261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2677271 + ... + 2678136.

It is an arithmetic number, because the mean of its divisors is an integer number (581061768).

Almost surely, 2^2318891231 is an apocalyptic number.

2318891231 is a deficient number, since it is larger than the sum of its proper divisors (5355841).

2318891231 is an equidigital number, since it uses as much as digits as its factorization.

2318891231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355840.

The product of its digits is 20736, while the sum is 38.

The square root of 2318891231 is about 48154.8671579520. The cubic root of 2318891231 is about 1323.6102634860.

The spelling of 2318891231 in words is "two billion, three hundred eighteen million, eight hundred ninety-one thousand, two hundred thirty-one".