12831314781 has 4 divisors (see below), whose sum is σ = 17108419712. Its totient is φ = 8554209852.

The previous prime is 12831314761. The next prime is 12831314827. The reversal of 12831314781 is 18741313821.

It is a happy number.

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 12831314781 - 2¹⁷ = 12831183709 is a prime.

It is a super-2 number, since 2×12831314781² (a number of 21 digits) 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 (12831314731) 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, 2138552461 + ... + 2138552466.

It is an arithmetic number, because the mean of its divisors is an integer number (4277104928).

Almost surely, 2^12831314781 is an apocalyptic number.

It is an amenable number.

12831314781 is a deficient number, since it is larger than the sum of its proper divisors (4277104931).

12831314781 is an equidigital number, since it uses as much as digits as its factorization.

12831314781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277104930.

The product of its digits is 32256, while the sum is 39.

The spelling of 12831314781 in words is "twelve billion, eight hundred thirty-one million, three hundred fourteen thousand, seven hundred eighty-one".