30051312 has 80 divisors (see below), whose sum is σ = 82911360. Its totient is φ = 9351936.

The previous prime is 30051299. The next prime is 30051313. The reversal of 30051312 is 21315003.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30051291 and 30051300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30051313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75498 + ... + 75894.

It is an arithmetic number, because the mean of its divisors is an integer number (1036392).

Almost surely, 2^30051312 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 30051312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41455680).

30051312 is an abundant number, since it is smaller than the sum of its proper divisors (52860048).

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

30051312 is a wasteful number, since it uses less digits than its factorization.

30051312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 30051312 is about 5481.9076971434. The cubic root of 30051312 is about 310.9003033726.

Adding to 30051312 its reverse (21315003), we get a palindrome (51366315).

The spelling of 30051312 in words is "thirty million, fifty-one thousand, three hundred twelve".