30505075 has 6 divisors (see below), whose sum is σ = 37826324. Its totient is φ = 24404040.

The previous prime is 30505037. The next prime is 30505081. The reversal of 30505075 is 57050503.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-30505075 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1220203 = 30505075 / (3 + 0 + 5 + 0 + 5 + 0 + 7 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 610077 + ... + 610126.

Almost surely, 2^30505075 is an apocalyptic number.

30505075 is a deficient number, since it is larger than the sum of its proper divisors (7321249).

30505075 is a wasteful number, since it uses less digits than its factorization.

30505075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220213 (or 1220208 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 25.

The square root of 30505075 is about 5523.1399583932. The cubic root of 30505075 is about 312.4573168370.

Adding to 30505075 its reverse (57050503), we get a palindrome (87555578).

The spelling of 30505075 in words is "thirty million, five hundred five thousand, seventy-five".