319305145 has 8 divisors (see below), whose sum is σ = 386682120. Its totient is φ = 253100160.

The previous prime is 319305131. The next prime is 319305157. The reversal of 319305145 is 541503913.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 131423296 + 187881849 = 11464^2 + 13707^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 319305145 - 2⁷ = 319305017 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 292396 + ... + 293485.

It is an arithmetic number, because the mean of its divisors is an integer number (48335265).

Almost surely, 2^319305145 is an apocalyptic number.

It is an amenable number.

319305145 is a deficient number, since it is larger than the sum of its proper divisors (67376975).

319305145 is a wasteful number, since it uses less digits than its factorization.

319305145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585995.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 319305145 is about 17869.1114776309. Note that the first 3 decimals coincide. The cubic root of 319305145 is about 683.4949426738.

The spelling of 319305145 in words is "three hundred nineteen million, three hundred five thousand, one hundred forty-five".