30503206505 has 8 divisors (see below), whose sum is σ = 38757015432. Its totient is φ = 22967120128.

The previous prime is 30503206501. The next prime is 30503206507. The reversal of 30503206505 is 50560230503.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 802475584 + 29700730921 = 28328^2 + 172339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30503206505 - 2² = 30503206501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30503206501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179430542 + ... + 179430711.

It is an arithmetic number, because the mean of its divisors is an integer number (4844626929).

Almost surely, 2^30503206505 is an apocalyptic number.

It is an amenable number.

30503206505 is a deficient number, since it is larger than the sum of its proper divisors (8253808927).

30503206505 is a wasteful number, since it uses less digits than its factorization.

30503206505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358861275.

The product of its (nonzero) digits is 13500, while the sum is 29.

The spelling of 30503206505 in words is "thirty billion, five hundred three million, two hundred six thousand, five hundred five".