15221055205 has 8 divisors (see below), whose sum is σ = 18442599552. Its totient is φ = 12058621968.

The previous prime is 15221055197. The next prime is 15221055229. The reversal of 15221055205 is 50255012251.

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 15221055205 - 2³ = 15221055197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14777209 + ... + 14778238.

It is an arithmetic number, because the mean of its divisors is an integer number (2305324944).

Almost surely, 2^15221055205 is an apocalyptic number.

It is an amenable number.

15221055205 is a deficient number, since it is larger than the sum of its proper divisors (3221544347).

15221055205 is a wasteful number, since it uses less digits than its factorization.

15221055205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29555555.

The product of its (nonzero) digits is 5000, while the sum is 28.

Adding to 15221055205 its reverse (50255012251), we get a palindrome (65476067456).

The spelling of 15221055205 in words is "fifteen billion, two hundred twenty-one million, fifty-five thousand, two hundred five".