30115145 has 4 divisors (see below), whose sum is σ = 36138180. Its totient is φ = 24092112.

The previous prime is 30115123. The next prime is 30115159. The reversal of 30115145 is 54151103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19855936 + 10259209 = 4456^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 30115145 - 2⁶ = 30115081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3011510 + ... + 3011519.

It is an arithmetic number, because the mean of its divisors is an integer number (9034545).

Almost surely, 2^30115145 is an apocalyptic number.

It is an amenable number.

30115145 is a deficient number, since it is larger than the sum of its proper divisors (6023035).

30115145 is an equidigital number, since it uses as much as digits as its factorization.

30115145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023034.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 30115145 is about 5487.7267606906. The cubic root of 30115145 is about 311.1202789485.

Adding to 30115145 its reverse (54151103), we get a palindrome (84266248).

The spelling of 30115145 in words is "thirty million, one hundred fifteen thousand, one hundred forty-five".