311312252445443 has 4 divisors (see below), whose sum is σ = 311796408359688. Its totient is φ = 310828096531200.

The previous prime is 311312252445391. The next prime is 311312252445487. The reversal of 311312252445443 is 344544252213113.

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 311312252445443 - 2¹⁶ = 311312252379907 is a prime.

It is a super-2 number, since 2×311312252445443² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311312252445394 and 311312252445403.

It is not an unprimeable number, because it can be changed into a prime (311312252445143) 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, 242077956158 + ... + 242077957443.

It is an arithmetic number, because the mean of its divisors is an integer number (77949102089922).

Almost surely, 2^{311312252445443} is an apocalyptic number.

311312252445443 is a deficient number, since it is larger than the sum of its proper divisors (484155914245).

311312252445443 is an equidigital number, since it uses as much as digits as its factorization.

311312252445443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484155914244.

The product of its digits is 1382400, while the sum is 44.

The spelling of 311312252445443 in words is "three hundred eleven trillion, three hundred twelve billion, two hundred fifty-two million, four hundred forty-five thousand, four hundred forty-three".