15997107 has 16 divisors (see below), whose sum is σ = 25660160. Its totient is φ = 8659872.

The previous prime is 15997103. The next prime is 15997109. The reversal of 15997107 is 70179951.

15997107 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15997107 - 2² = 15997103 is a prime.

It is a Duffinian number.

15997107 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (15997103) 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, 19648 + ... + 20445.

It is an arithmetic number, because the mean of its divisors is an integer number (1603760).

Almost surely, 2^15997107 is an apocalyptic number.

15997107 is a deficient number, since it is larger than the sum of its proper divisors (9663053).

15997107 is a wasteful number, since it uses less digits than its factorization.

15997107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40122.

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 15997107 is about 3999.6383586519. The cubic root of 15997107 is about 251.9690217652.

The spelling of 15997107 in words is "fifteen million, nine hundred ninety-seven thousand, one hundred seven".