318412821 has 8 divisors (see below), whose sum is σ = 426405280. Its totient is φ = 211347792.

The previous prime is 318412819. The next prime is 318412841. The reversal of 318412821 is 128214813.

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

It is not a de Polignac number, because 318412821 - 2¹ = 318412819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318412841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231055 + ... + 232428.

It is an arithmetic number, because the mean of its divisors is an integer number (53300660).

Almost surely, 2^318412821 is an apocalyptic number.

It is an amenable number.

318412821 is a deficient number, since it is larger than the sum of its proper divisors (107992459).

318412821 is a wasteful number, since it uses less digits than its factorization.

318412821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463715.

The product of its digits is 3072, while the sum is 30.

The square root of 318412821 is about 17844.1256720524. The cubic root of 318412821 is about 682.8576547255.

The spelling of 318412821 in words is "three hundred eighteen million, four hundred twelve thousand, eight hundred twenty-one".