15995797215 has 8 divisors (see below), whose sum is σ = 25593275568. Its totient is φ = 8531091840.

The previous prime is 15995797211. The next prime is 15995797219. The reversal of 15995797215 is 51279759951.

It is an interprime number because it is at equal distance from previous prime (15995797211) and next prime (15995797219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15995797215 - 2² = 15995797211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15995797211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533193226 + ... + 533193255.

It is an arithmetic number, because the mean of its divisors is an integer number (3199159446).

Almost surely, 2^15995797215 is an apocalyptic number.

15995797215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15995797215 is a deficient number, since it is larger than the sum of its proper divisors (9597478353).

15995797215 is a wasteful number, since it uses less digits than its factorization.

15995797215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066386489.

The product of its digits is 8930250, while the sum is 60.

The spelling of 15995797215 in words is "fifteen billion, nine hundred ninety-five million, seven hundred ninety-seven thousand, two hundred fifteen".