15321240205 has 16 divisors (see below), whose sum is σ = 19025049600. Its totient is φ = 11832554880.

The previous prime is 15321240161. The next prime is 15321240247. The reversal of 15321240205 is 50204212351.

15321240205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15321240205 - 2¹³ = 15321232013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15321240205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57445 + ... + 184234.

It is an arithmetic number, because the mean of its divisors is an integer number (1189065600).

Almost surely, 2^15321240205 is an apocalyptic number.

It is an amenable number.

15321240205 is a deficient number, since it is larger than the sum of its proper divisors (3703809395).

15321240205 is a wasteful number, since it uses less digits than its factorization.

15321240205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242124.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 15321240205 its reverse (50204212351), we get a palindrome (65525452556).

The spelling of 15321240205 in words is "fifteen billion, three hundred twenty-one million, two hundred forty thousand, two hundred five".