30500005 has 4 divisors (see below), whose sum is σ = 36600012. Its totient is φ = 24400000.

The previous prime is 30500003. The next prime is 30500009. The reversal of 30500005 is 50000503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50000503 = 7 ⋅7142929.

It can be written as a sum of positive squares in 2 ways, for example, as 20958084 + 9541921 = 4578^2 + 3089^2 .

It is not a de Polignac number, because 30500005 - 2¹ = 30500003 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30500003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3049996 + ... + 3050005.

It is an arithmetic number, because the mean of its divisors is an integer number (9150003).

Almost surely, 2^30500005 is an apocalyptic number.

It is an amenable number.

30500005 is a deficient number, since it is larger than the sum of its proper divisors (6100007).

30500005 is an equidigital number, since it uses as much as digits as its factorization.

30500005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100006.

The product of its (nonzero) digits is 75, while the sum is 13.

The square root of 30500005 is about 5522.6809612723. The cubic root of 30500005 is about 312.4400055495.

Adding to 30500005 its reverse (50000503), we get a palindrome (80500508).

The spelling of 30500005 in words is "thirty million, five hundred thousand, five".