30509145 has 24 divisors (see below), whose sum is σ = 54115776. Its totient is φ = 15892128.

The previous prime is 30509137. The next prime is 30509191. The reversal of 30509145 is 54190503.

It is not a de Polignac number, because 30509145 - 2³ = 30509137 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5949 + ... + 9818.

It is an arithmetic number, because the mean of its divisors is an integer number (2254824).

Almost surely, 2^30509145 is an apocalyptic number.

It is an amenable number.

30509145 is a deficient number, since it is larger than the sum of its proper divisors (23606631).

30509145 is a wasteful number, since it uses less digits than its factorization.

30509145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15821 (or 15818 counting only the distinct ones).

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

The square root of 30509145 is about 5523.5083959382. The cubic root of 30509145 is about 312.4712122815.

Adding to 30509145 its reverse (54190503), we get a palindrome (84699648).

The spelling of 30509145 in words is "thirty million, five hundred nine thousand, one hundred forty-five".