30317312 has 72 divisors (see below), whose sum is σ = 66716160. Its totient is φ = 13685760.

The previous prime is 30317269. The next prime is 30317317. The reversal of 30317312 is 21371303.

It is a happy number.

30317312 is nontrivially palindromic in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30317317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111737 + ... + 112007.

Almost surely, 2^30317312 is an apocalyptic number.

30317312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30317312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33358080).

30317312 is an abundant number, since it is smaller than the sum of its proper divisors (36398848).

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

30317312 is a wasteful number, since it uses less digits than its factorization.

30317312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 30317312 is about 5506.1158723732. The cubic root of 30317312 is about 311.8149242052.

Adding to 30317312 its reverse (21371303), we get a palindrome (51688615).

The spelling of 30317312 in words is "thirty million, three hundred seventeen thousand, three hundred twelve".