15215165205 has 16 divisors (see below), whose sum is σ = 24346249920. Its totient is φ = 8114092928.

The previous prime is 15215165179. The next prime is 15215165209. The reversal of 15215165205 is 50256151251.

It is a cyclic number.

It is not a de Polignac number, because 15215165205 - 2⁹ = 15215164693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15215165209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190654 + ... + 258416.

It is an arithmetic number, because the mean of its divisors is an integer number (1521640620).

Almost surely, 2^15215165205 is an apocalyptic number.

15215165205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15215165205 is a deficient number, since it is larger than the sum of its proper divisors (9131084715).

15215165205 is a wasteful number, since it uses less digits than its factorization.

15215165205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82740.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 15215165205 in words is "fifteen billion, two hundred fifteen million, one hundred sixty-five thousand, two hundred five".