30205315253 has 4 divisors (see below), whose sum is σ = 30214468908. Its totient is φ = 30196161600.

The previous prime is 30205315247. The next prime is 30205315297. The reversal of 30205315253 is 35251350203.

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 13806720004 + 16398595249 = 117502^2 + 128057^2 .

It is a cyclic number.

It is not a de Polignac number, because 30205315253 - 2⁴ = 30205315237 is a prime.

It is a super-2 number, since 2×30205315253² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30205315223) by changing a digit.

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, 4571876 + ... + 4578477.

It is an arithmetic number, because the mean of its divisors is an integer number (7553617227).

Almost surely, 2^30205315253 is an apocalyptic number.

It is an amenable number.

30205315253 is a deficient number, since it is larger than the sum of its proper divisors (9153655).

30205315253 is an equidigital number, since it uses as much as digits as its factorization.

30205315253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9153654.

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

Adding to 30205315253 its reverse (35251350203), we get a palindrome (65456665456).

The spelling of 30205315253 in words is "thirty billion, two hundred five million, three hundred fifteen thousand, two hundred fifty-three".