318427321 has 2 divisors, whose sum is σ = 318427322. Its totient is φ = 318427320.

The previous prime is 318427273. The next prime is 318427331. The reversal of 318427321 is 123724813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305725225 + 12702096 = 17485^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 318427321 - 2¹⁵ = 318394553 is a prime.

It is not a weakly prime, because it can be changed into another prime (318427331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159213660 + 159213661.

It is an arithmetic number, because the mean of its divisors is an integer number (159213661).

Almost surely, 2^318427321 is an apocalyptic number.

It is an amenable number.

318427321 is a deficient number, since it is larger than the sum of its proper divisors (1).

318427321 is an equidigital number, since it uses as much as digits as its factorization.

318427321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 318427321 is about 17844.5319636016. The cubic root of 318427321 is about 682.8680199757.

The spelling of 318427321 in words is "three hundred eighteen million, four hundred twenty-seven thousand, three hundred twenty-one".