31312043313 has 8 divisors (see below), whose sum is σ = 41751719808. Its totient is φ = 20873531184.

The previous prime is 31312043297. The next prime is 31312043327. The reversal of 31312043313 is 31334021313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31312043313 - 2⁴ = 31312043297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312043353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226281 + ... + 337382.

It is an arithmetic number, because the mean of its divisors is an integer number (5218964976).

Almost surely, 2^31312043313 is an apocalyptic number.

It is an amenable number.

31312043313 is a deficient number, since it is larger than the sum of its proper divisors (10439676495).

31312043313 is a wasteful number, since it uses less digits than its factorization.

31312043313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582183.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31312043313 its reverse (31334021313), we get a palindrome (62646064626).

The spelling of 31312043313 in words is "thirty-one billion, three hundred twelve million, forty-three thousand, three hundred thirteen".