318231616 has 56 divisors (see below), whose sum is σ = 674461440. Its totient is φ = 148646400.

The previous prime is 318231593. The next prime is 318231649. The reversal of 318231616 is 616132813.

It is a super-2 number, since 2×318231616² = 202542722843942912, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 54771 + ... + 60301.

Almost surely, 2^318231616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318231616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337230720).

318231616 is an abundant number, since it is smaller than the sum of its proper divisors (356229824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318231616 is a wasteful number, since it uses less digits than its factorization.

318231616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603 (or 5593 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 318231616 is about 17839.0475082051. The cubic root of 318231616 is about 682.7280947192.

The spelling of 318231616 in words is "three hundred eighteen million, two hundred thirty-one thousand, six hundred sixteen".