318871225 has 6 divisors (see below), whose sum is σ = 395400350. Its totient is φ = 255096960.

The previous prime is 318871207. The next prime is 318871229. The reversal of 318871225 is 522178813.

It can be written as a sum of positive squares in 3 ways, for example, as 29735209 + 289136016 = 5453^2 + 17004^2 .

It is a de Polignac number, because none of the positive numbers 2^k-318871225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (318871229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6377400 + ... + 6377449.

Almost surely, 2^318871225 is an apocalyptic number.

It is an amenable number.

318871225 is a deficient number, since it is larger than the sum of its proper divisors (76529125).

318871225 is a wasteful number, since it uses less digits than its factorization.

318871225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12754859 (or 12754854 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 318871225 is about 17856.9657276929. The cubic root of 318871225 is about 683.1851903062.

The spelling of 318871225 in words is "three hundred eighteen million, eight hundred seventy-one thousand, two hundred twenty-five".