31343314213 has 4 divisors (see below), whose sum is σ = 31344115180. Its totient is φ = 31342513248.

The previous prime is 31343314207. The next prime is 31343314217. The reversal of 31343314213 is 31241334313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22693012164 + 8650302049 = 150642^2 + 93007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31343314213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343314217) 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, 338598 + ... + 421111.

It is an arithmetic number, because the mean of its divisors is an integer number (7836028795).

Almost surely, 2^31343314213 is an apocalyptic number.

It is an amenable number.

31343314213 is a deficient number, since it is larger than the sum of its proper divisors (800967).

31343314213 is an equidigital number, since it uses as much as digits as its factorization.

31343314213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800966.

The product of its digits is 7776, while the sum is 28.

Adding to 31343314213 its reverse (31241334313), we get a palindrome (62584648526).

The spelling of 31343314213 in words is "thirty-one billion, three hundred forty-three million, three hundred fourteen thousand, two hundred thirteen".