318213641 has 16 divisors (see below), whose sum is σ = 330860544. Its totient is φ = 305869824.

The previous prime is 318213629. The next prime is 318213677. The reversal of 318213641 is 146312813.

It is a cyclic number.

It is not a de Polignac number, because 318213641 - 2¹⁸ = 317951497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318213601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1016501 + ... + 1016813.

It is an arithmetic number, because the mean of its divisors is an integer number (20678784).

Almost surely, 2^318213641 is an apocalyptic number.

It is an amenable number.

318213641 is a deficient number, since it is larger than the sum of its proper divisors (12646903).

318213641 is a wasteful number, since it uses less digits than its factorization.

318213641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its digits is 3456, while the sum is 29.

The square root of 318213641 is about 17838.5436905595. The cubic root of 318213641 is about 682.7152400688.

The spelling of 318213641 in words is "three hundred eighteen million, two hundred thirteen thousand, six hundred forty-one".