311223235534543 has 4 divisors (see below), whose sum is σ = 324754680557808. Its totient is φ = 297691790511280.

The previous prime is 311223235534511. The next prime is 311223235534571. The reversal of 311223235534543 is 345435532322113.

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

It is a cyclic number.

It is not a de Polignac number, because 311223235534543 - 2⁵ = 311223235534511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311223235534493 and 311223235534502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311223235534943) 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, 6765722511598 + ... + 6765722511643.

It is an arithmetic number, because the mean of its divisors is an integer number (81188670139452).

Almost surely, 2^{311223235534543} is an apocalyptic number.

311223235534543 is a deficient number, since it is larger than the sum of its proper divisors (13531445023265).

311223235534543 is a wasteful number, since it uses less digits than its factorization.

311223235534543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531445023264.

The product of its digits is 3888000, while the sum is 46.

Adding to 311223235534543 its reverse (345435532322113), we get a palindrome (656658767856656).

The spelling of 311223235534543 in words is "three hundred eleven trillion, two hundred twenty-three billion, two hundred thirty-five million, five hundred thirty-four thousand, five hundred forty-three".