318145505 has 8 divisors (see below), whose sum is σ = 381882624. Its totient is φ = 254444400.

The previous prime is 318145489. The next prime is 318145517. The reversal of 318145505 is 505541813.

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

It is not a de Polignac number, because 318145505 - 2⁴ = 318145489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17570 + ... + 30740.

It is an arithmetic number, because the mean of its divisors is an integer number (47735328).

Almost surely, 2^318145505 is an apocalyptic number.

It is an amenable number.

318145505 is a deficient number, since it is larger than the sum of its proper divisors (63737119).

318145505 is a wasteful number, since it uses less digits than its factorization.

318145505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18007.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 318145505 is about 17836.6337911614. The cubic root of 318145505 is about 682.6665088600. Note that the first 3 decimals are identical.

The spelling of 318145505 in words is "three hundred eighteen million, one hundred forty-five thousand, five hundred five".