231315282 has 48 divisors (see below), whose sum is σ = 556040160. Its totient is φ = 68904000.

The previous prime is 231315257. The next prime is 231315283. The reversal of 231315282 is 282513132.

231315282 is a `hidden beast` number, since 2 + 3 + 131 + 528 + 2 = 666.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (231315283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1782 + ... + 21582.

It is an arithmetic number, because the mean of its divisors is an integer number (11584170).

Almost surely, 2^231315282 is an apocalyptic number.

231315282 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231315282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278020080).

231315282 is an abundant number, since it is smaller than the sum of its proper divisors (324724878).

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

231315282 is a wasteful number, since it uses less digits than its factorization.

231315282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19879 (or 19876 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 231315282 is about 15209.0526332182. The cubic root of 231315282 is about 613.8582664007.

It can be divided in two parts, 231 and 315282, that added together give a palindrome (315513).

The spelling of 231315282 in words is "two hundred thirty-one million, three hundred fifteen thousand, two hundred eighty-two".