312211313242243 has 4 divisors (see below), whose sum is σ = 312212471578560. Its totient is φ = 312210154905928.

The previous prime is 312211313242187. The next prime is 312211313242259. The reversal of 312211313242243 is 342242313112213.

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 312211313242243 - 2⁴⁵ = 277026941153411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312211313242199 and 312211313242208.

It is not an unprimeable number, because it can be changed into a prime (312211313240243) 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, 578763763 + ... + 579302956.

It is an arithmetic number, because the mean of its divisors is an integer number (78053117894640).

Almost surely, 2^{312211313242243} is an apocalyptic number.

312211313242243 is a deficient number, since it is larger than the sum of its proper divisors (1158336317).

312211313242243 is a wasteful number, since it uses less digits than its factorization.

312211313242243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158336316.

The product of its digits is 41472, while the sum is 34.

Adding to 312211313242243 its reverse (342242313112213), we get a palindrome (654453626354456).

The spelling of 312211313242243 in words is "three hundred twelve trillion, two hundred eleven billion, three hundred thirteen million, two hundred forty-two thousand, two hundred forty-three".