31043051013243 has 16 divisors (see below), whose sum is σ = 43476360546816. Its totient is φ = 19664472273600.

The previous prime is 31043051013203. The next prime is 31043051013263. The reversal of 31043051013243 is 34231015034013.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31043051013243 is a prime.

It is a super-2 number, since 2×31043051013243² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31043051013243.

It is not an unprimeable number, because it can be changed into a prime (31043051013203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489722330 + ... + 1489743167.

It is an arithmetic number, because the mean of its divisors is an integer number (2717272534176).

Almost surely, 2^{31043051013243} is an apocalyptic number.

31043051013243 is a deficient number, since it is larger than the sum of its proper divisors (12433309533573).

31043051013243 is a wasteful number, since it uses less digits than its factorization.

31043051013243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979465674.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 31043051013243 its reverse (34231015034013), we get a palindrome (65274066047256).

The spelling of 31043051013243 in words is "thirty-one trillion, forty-three billion, fifty-one million, thirteen thousand, two hundred forty-three".