2231318765 has 32 divisors (see below), whose sum is σ = 3083554656. Its totient is φ = 1535385600.

The previous prime is 2231318759. The next prime is 2231318779. The reversal of 2231318765 is 5678131322.

It can be written as a sum of positive squares in 16 ways, for example, as 65254084 + 2166064681 = 8078^2 + 46541^2 .

It is not a de Polignac number, because 2231318765 - 2¹⁰ = 2231317741 is a prime.

It is a super-3 number, since 3×2231318765³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 101609 + ... + 121601.

It is an arithmetic number, because the mean of its divisors is an integer number (96361083).

Almost surely, 2^2231318765 is an apocalyptic number.

It is an amenable number.

2231318765 is a deficient number, since it is larger than the sum of its proper divisors (852235891).

2231318765 is a wasteful number, since it uses less digits than its factorization.

2231318765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20129.

The product of its digits is 60480, while the sum is 38.

The square root of 2231318765 is about 47236.8369495672. The cubic root of 2231318765 is about 1306.7340443688.

The spelling of 2231318765 in words is "two billion, two hundred thirty-one million, three hundred eighteen thousand, seven hundred sixty-five".