318263 has 4 divisors (see below), whose sum is σ = 347208. Its totient is φ = 289320.

The previous prime is 318259. The next prime is 318271. The reversal of 318263 is 362813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362813 = 11 ⋅32983.

It is a cyclic number.

It is not a de Polignac number, because 318263 - 2² = 318259 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 (318203) 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, 14456 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (86802).

2³¹⁸²⁶³ is an apocalyptic number.

318263 is a deficient number, since it is larger than the sum of its proper divisors (28945).

318263 is a wasteful number, since it uses less digits than its factorization.

318263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28944.

The product of its digits is 864, while the sum is 23.

The square root of 318263 is about 564.1480302190. The cubic root of 318263 is about 68.2750537528.

The spelling of 318263 in words is "three hundred eighteen thousand, two hundred sixty-three".