311263 has 4 divisors (see below), whose sum is σ = 314280. Its totient is φ = 308248.

The previous prime is 311237. The next prime is 311279. The reversal of 311263 is 362113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362113 = 257 ⋅1409.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311203) 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, 1348 + ... + 1561.

It is an arithmetic number, because the mean of its divisors is an integer number (78570).

2³¹¹²⁶³ is an apocalyptic number.

311263 is a deficient number, since it is larger than the sum of its proper divisors (3017).

311263 is a wasteful number, since it uses less digits than its factorization.

311263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its digits is 108, while the sum is 16.

The square root of 311263 is about 557.9094908675. The cubic root of 311263 is about 67.7707824208.

Adding to 311263 its reverse (362113), we get a palindrome (673376).

The spelling of 311263 in words is "three hundred eleven thousand, two hundred sixty-three".