319312225 has 6 divisors (see below), whose sum is σ = 395947190. Its totient is φ = 255449760.

The previous prime is 319312199. The next prime is 319312229. The reversal of 319312225 is 522213913.

It can be written as a sum of positive squares in 3 ways, for example, as 53100369 + 266211856 = 7287^2 + 16316^2 .

It is not a de Polignac number, because 319312225 - 2¹⁷ = 319181153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 319312193 and 319312202.

It is not an unprimeable number, because it can be changed into a prime (319312229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6386220 + ... + 6386269.

Almost surely, 2^319312225 is an apocalyptic number.

It is an amenable number.

319312225 is a deficient number, since it is larger than the sum of its proper divisors (76634965).

319312225 is a wasteful number, since it uses less digits than its factorization.

319312225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12772499 (or 12772494 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 319312225 is about 17869.3095837528. The cubic root of 319312225 is about 683.4999943811.

The spelling of 319312225 in words is "three hundred nineteen million, three hundred twelve thousand, two hundred twenty-five".