30231312 has 20 divisors (see below), whose sum is σ = 78097680. Its totient is φ = 10077088.

The previous prime is 30231307. The next prime is 30231317. The reversal of 30231312 is 21313203.

It is an interprime number because it is at equal distance from previous prime (30231307) and next prime (30231317).

It is a junction number, because it is equal to n+sod(n) for n = 30231291 and 30231300.

It is not an unprimeable number, because it can be changed into a prime (30231317) 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 3 ways as a sum of consecutive naturals, for example, 314862 + ... + 314957.

It is an arithmetic number, because the mean of its divisors is an integer number (3904884).

Almost surely, 2^30231312 is an apocalyptic number.

It is an amenable number.

30231312 is an abundant number, since it is smaller than the sum of its proper divisors (47866368).

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

30231312 is a wasteful number, since it uses less digits than its factorization.

30231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629830 (or 629824 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 30231312 is about 5498.3008284378. The cubic root of 30231312 is about 311.5198070173.

Adding to 30231312 its reverse (21313203), we get a palindrome (51544515).

The spelling of 30231312 in words is "thirty million, two hundred thirty-one thousand, three hundred twelve".