318920227 has 4 divisors (see below), whose sum is σ = 318985920. Its totient is φ = 318854536.

The previous prime is 318920209. The next prime is 318920257. The reversal of 318920227 is 722029813.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318920227 is a prime.

It is a super-2 number, since 2×318920227² = 203420222379463058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 318920192 and 318920201.

It is not an unprimeable number, because it can be changed into a prime (318920257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24928 + ... + 35485.

It is an arithmetic number, because the mean of its divisors is an integer number (79746480).

Almost surely, 2^318920227 is an apocalyptic number.

318920227 is a deficient number, since it is larger than the sum of its proper divisors (65693).

318920227 is an equidigital number, since it uses as much as digits as its factorization.

318920227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65692.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 318920227 is about 17858.3377445943. The cubic root of 318920227 is about 683.2201842927.

The spelling of 318920227 in words is "three hundred eighteen million, nine hundred twenty thousand, two hundred twenty-seven".