15421311205 has 16 divisors (see below), whose sum is σ = 18601090560. Its totient is φ = 12273464448.

The previous prime is 15421311197. The next prime is 15421311229. The reversal of 15421311205 is 50211312451.

It is a cyclic number.

It is not a de Polignac number, because 15421311205 - 2³ = 15421311197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15421311205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512916 + ... + 1523074.

It is an arithmetic number, because the mean of its divisors is an integer number (1162568160).

Almost surely, 2^15421311205 is an apocalyptic number.

It is an amenable number.

15421311205 is a deficient number, since it is larger than the sum of its proper divisors (3179779355).

15421311205 is a wasteful number, since it uses less digits than its factorization.

15421311205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 15421311205 its reverse (50211312451), we get a palindrome (65632623656).

The spelling of 15421311205 in words is "fifteen billion, four hundred twenty-one million, three hundred eleven thousand, two hundred five".