15565227159 has 12 divisors (see below), whose sum is σ = 21493959656. Its totient is φ = 10018995168.

The previous prime is 15565227157. The next prime is 15565227169. The reversal of 15565227159 is 95172256551.

It is not a de Polignac number, because 15565227159 - 2¹ = 15565227157 is a prime.

It is a super-2 number, since 2×15565227159² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15565227157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3082144 + ... + 3087189.

Almost surely, 2^15565227159 is an apocalyptic number.

15565227159 is a deficient number, since it is larger than the sum of its proper divisors (5928732497).

15565227159 is an equidigital number, since it uses as much as digits as its factorization.

15565227159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169394 (or 6169365 counting only the distinct ones).

The product of its digits is 945000, while the sum is 48.

The spelling of 15565227159 in words is "fifteen billion, five hundred sixty-five million, two hundred twenty-seven thousand, one hundred fifty-nine".