318228403 has 4 divisors (see below), whose sum is σ = 319377520. Its totient is φ = 317079288.

The previous prime is 318228401. The next prime is 318228413. The reversal of 318228403 is 304822813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304822813 = 4679 ⋅65147.

It is a cyclic number.

It is not a de Polignac number, because 318228403 - 2¹ = 318228401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318228401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574143 + ... + 574696.

It is an arithmetic number, because the mean of its divisors is an integer number (79844380).

Almost surely, 2^318228403 is an apocalyptic number.

318228403 is a deficient number, since it is larger than the sum of its proper divisors (1149117).

318228403 is a wasteful number, since it uses less digits than its factorization.

318228403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149116.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 318228403 is about 17838.9574527213. The cubic root of 318228403 is about 682.7257970083.

The spelling of 318228403 in words is "three hundred eighteen million, two hundred twenty-eight thousand, four hundred three".