316213505 has 16 divisors (see below), whose sum is σ = 382872720. Its totient is φ = 250705152.

The previous prime is 316213493. The next prime is 316213531. The reversal of 316213505 is 505312613.

It can be written as a sum of positive squares in 8 ways, for example, as 14010049 + 302203456 = 3743^2 + 17384^2 .

It is a cyclic number.

It is not a de Polignac number, because 316213505 - 2⁶ = 316213441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316667 + ... + 317663.

It is an arithmetic number, because the mean of its divisors is an integer number (23929545).

Almost surely, 2^316213505 is an apocalyptic number.

It is an amenable number.

316213505 is a deficient number, since it is larger than the sum of its proper divisors (66659215).

316213505 is a wasteful number, since it uses less digits than its factorization.

316213505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 316213505 is about 17782.3931179130. The cubic root of 316213505 is about 681.2818274275.

The spelling of 316213505 in words is "three hundred sixteen million, two hundred thirteen thousand, five hundred five".