15215115205 has 32 divisors (see below), whose sum is σ = 19317657600. Its totient is φ = 11487840000.

The previous prime is 15215115191. The next prime is 15215115221. The reversal of 15215115205 is 50251151251.

It is not a de Polignac number, because 15215115205 - 2⁹ = 15215114693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1150380 + ... + 1163530.

It is an arithmetic number, because the mean of its divisors is an integer number (603676800).

Almost surely, 2^15215115205 is an apocalyptic number.

It is an amenable number.

15215115205 is a deficient number, since it is larger than the sum of its proper divisors (4102542395).

15215115205 is a wasteful number, since it uses less digits than its factorization.

15215115205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13365.

The product of its (nonzero) digits is 2500, while the sum is 28.

Adding to 15215115205 its reverse (50251151251), we get a palindrome (65466266456).

The spelling of 15215115205 in words is "fifteen billion, two hundred fifteen million, one hundred fifteen thousand, two hundred five".