30513012 has 48 divisors (see below), whose sum is σ = 76991040. Its totient is φ = 9372672.

The previous prime is 30512987. The next prime is 30513047. The reversal of 30513012 is 21031503.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30512982 and 30513000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6628 + ... + 10244.

It is an arithmetic number, because the mean of its divisors is an integer number (1603980).

Almost surely, 2^30513012 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 30513012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38495520).

30513012 is an abundant number, since it is smaller than the sum of its proper divisors (46478028).

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

30513012 is a wasteful number, since it uses less digits than its factorization.

30513012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3678 counting only the distinct ones).

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

The square root of 30513012 is about 5523.8584341020. The cubic root of 30513012 is about 312.4844135159.

Adding to 30513012 its reverse (21031503), we get a palindrome (51544515).

The spelling of 30513012 in words is "thirty million, five hundred thirteen thousand, twelve".