311663243 has 4 divisors (see below), whose sum is σ = 321716928. Its totient is φ = 301609560.

The previous prime is 311663171. The next prime is 311663273. The reversal of 311663243 is 342366113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342366113 = 41 ⋅8350393.

It is a cyclic number.

It is not a de Polignac number, because 311663243 - 2¹⁶ = 311597707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311663273) 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, 5026796 + ... + 5026857.

It is an arithmetic number, because the mean of its divisors is an integer number (80429232).

Almost surely, 2^311663243 is an apocalyptic number.

311663243 is a deficient number, since it is larger than the sum of its proper divisors (10053685).

311663243 is a wasteful number, since it uses less digits than its factorization.

311663243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053684.

The product of its digits is 7776, while the sum is 29.

The square root of 311663243 is about 17653.9866035975. The cubic root of 311663243 is about 677.9981806294.

The spelling of 311663243 in words is "three hundred eleven million, six hundred sixty-three thousand, two hundred forty-three".