31234312223213 has 16 divisors (see below), whose sum is σ = 34717772952576. Its totient is φ = 27858214338240.

The previous prime is 31234312223207. The next prime is 31234312223237. The reversal of 31234312223213 is 31232221343213.

It is not a de Polignac number, because 31234312223213 - 2⁴ = 31234312223197 is a prime.

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 31234312223213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234312223243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18376820 + ... + 20004402.

It is an arithmetic number, because the mean of its divisors is an integer number (2169860809536).

Almost surely, 2^{31234312223213} is an apocalyptic number.

It is an amenable number.

31234312223213 is a deficient number, since it is larger than the sum of its proper divisors (3483460729363).

31234312223213 is a wasteful number, since it uses less digits than its factorization.

31234312223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660564.

The product of its digits is 31104, while the sum is 32.

Adding to 31234312223213 its reverse (31232221343213), we get a palindrome (62466533566426).

The spelling of 31234312223213 in words is "thirty-one trillion, two hundred thirty-four billion, three hundred twelve million, two hundred twenty-three thousand, two hundred thirteen".