30305250505 has 4 divisors (see below), whose sum is σ = 36366300612. Its totient is φ = 24244200400.

The previous prime is 30305250449. The next prime is 30305250517. The reversal of 30305250505 is 50505250303.

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 10927775296 + 19377475209 = 104536^2 + 139203^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30305250505 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030525046 + ... + 3030525055.

It is an arithmetic number, because the mean of its divisors is an integer number (9091575153).

Almost surely, 2^30305250505 is an apocalyptic number.

It is an amenable number.

30305250505 is a deficient number, since it is larger than the sum of its proper divisors (6061050107).

30305250505 is an equidigital number, since it uses as much as digits as its factorization.

30305250505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061050106.

The product of its (nonzero) digits is 11250, while the sum is 28.

The spelling of 30305250505 in words is "thirty billion, three hundred five million, two hundred fifty thousand, five hundred five".