30115566 has 96 divisors (see below), whose sum is σ = 74666592. Its totient is φ = 8709120.

The previous prime is 30115549. The next prime is 30115567. The reversal of 30115566 is 66551103.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30115567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 412506 + ... + 412578.

It is an arithmetic number, because the mean of its divisors is an integer number (777777).

Almost surely, 2^30115566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30115566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37333296).

30115566 is an abundant number, since it is smaller than the sum of its proper divisors (44551026).

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

30115566 is a wasteful number, since it uses less digits than its factorization.

30115566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 30115566 is about 5487.7651188804. The cubic root of 30115566 is about 311.1217287287.

Adding to 30115566 its reverse (66551103), we get a palindrome (96666669).

The spelling of 30115566 in words is "thirty million, one hundred fifteen thousand, five hundred sixty-six".