31256223013343 has 16 divisors (see below), whose sum is σ = 31589583538176. Its totient is φ = 30924555417600.

The previous prime is 31256223013339. The next prime is 31256223013357. The reversal of 31256223013343 is 34331032265213.

It is a cyclic number.

It is not a de Polignac number, because 31256223013343 - 2² = 31256223013339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31256223013297 and 31256223013306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31256223013313) 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, 340796030 + ... + 340887732.

It is an arithmetic number, because the mean of its divisors is an integer number (1974348971136).

Almost surely, 2^{31256223013343} is an apocalyptic number.

31256223013343 is a deficient number, since it is larger than the sum of its proper divisors (333360524833).

31256223013343 is a wasteful number, since it uses less digits than its factorization.

31256223013343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100894.

The product of its (nonzero) digits is 233280, while the sum is 38.

Adding to 31256223013343 its reverse (34331032265213), we get a palindrome (65587255278556).

The spelling of 31256223013343 in words is "thirty-one trillion, two hundred fifty-six billion, two hundred twenty-three million, thirteen thousand, three hundred forty-three".