2231312313 has 4 divisors (see below), whose sum is σ = 2975083088. Its totient is φ = 1487541540.

The previous prime is 2231312311. The next prime is 2231312383. The reversal of 2231312313 is 3132131322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2231312313 - 2¹ = 2231312311 is a prime.

It is a super-3 number, since 3×2231312313³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2231312313.

It is not an unprimeable number, because it can be changed into a prime (2231312311) 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, 371885383 + ... + 371885388.

It is an arithmetic number, because the mean of its divisors is an integer number (743770772).

Almost surely, 2^2231312313 is an apocalyptic number.

It is an amenable number.

2231312313 is a deficient number, since it is larger than the sum of its proper divisors (743770775).

2231312313 is an equidigital number, since it uses as much as digits as its factorization.

2231312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743770774.

The product of its digits is 648, while the sum is 21.

The square root of 2231312313 is about 47236.7686553600. The cubic root of 2231312313 is about 1306.7327848661.

Adding to 2231312313 its reverse (3132131322), we get a palindrome (5363443635).

The spelling of 2231312313 in words is "two billion, two hundred thirty-one million, three hundred twelve thousand, three hundred thirteen".