30185005 has 4 divisors (see below), whose sum is σ = 36222012. Its totient is φ = 24148000.

The previous prime is 30184997. The next prime is 30185017. The reversal of 30185005 is 50058103.

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 4813636 + 25371369 = 2194^2 + 5037^2 .

It is not a de Polignac number, because 30185005 - 2³ = 30184997 is a prime.

It is a super-2 number, since 2×30185005² = 1822269053700050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3018496 + ... + 3018505.

It is an arithmetic number, because the mean of its divisors is an integer number (9055503).

Almost surely, 2^30185005 is an apocalyptic number.

It is an amenable number.

30185005 is a deficient number, since it is larger than the sum of its proper divisors (6037007).

30185005 is an equidigital number, since it uses as much as digits as its factorization.

30185005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037006.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 30185005 is about 5494.0881864055. The cubic root of 30185005 is about 311.3606682690.

The spelling of 30185005 in words is "thirty million, one hundred eighty-five thousand, five".