318225132 has 48 divisors (see below), whose sum is σ = 829271520. Its totient is φ = 105529536.

The previous prime is 318225121. The next prime is 318225133. The reversal of 318225132 is 231522813.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 318225096 and 318225105.

It is not an unprimeable number, because it can be changed into a prime (318225133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13798 + ... + 28754.

It is an arithmetic number, because the mean of its divisors is an integer number (17276490).

Almost surely, 2^318225132 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 318225132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414635760).

318225132 is an abundant number, since it is smaller than the sum of its proper divisors (511046388).

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

318225132 is a wasteful number, since it uses less digits than its factorization.

318225132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167 (or 15159 counting only the distinct ones).

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

The square root of 318225132 is about 17838.8657711190. The cubic root of 318225132 is about 682.7234578041.

Adding to 318225132 its reverse (231522813), we get a palindrome (549747945).

The spelling of 318225132 in words is "three hundred eighteen million, two hundred twenty-five thousand, one hundred thirty-two".