16115117 has 4 divisors (see below), whose sum is σ = 16124796. Its totient is φ = 16105440.

The previous prime is 16115107. The next prime is 16115119. The reversal of 16115117 is 71151161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 14891881 = 1106^2 + 3859^2 .

It is a cyclic number.

It is not a de Polignac number, because 16115117 - 2⁴ = 16115101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16115092 and 16115101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16115119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634 + ... + 5907.

It is an arithmetic number, because the mean of its divisors is an integer number (4031199).

Almost surely, 2^16115117 is an apocalyptic number.

It is an amenable number.

16115117 is a deficient number, since it is larger than the sum of its proper divisors (9679).

16115117 is an equidigital number, since it uses as much as digits as its factorization.

16115117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9678.

The product of its digits is 210, while the sum is 23.

The square root of 16115117 is about 4014.3638350304. The cubic root of 16115117 is about 252.5870927874.

Adding to 16115117 its reverse (71151161), we get a palindrome (87266278).

The spelling of 16115117 in words is "sixteen million, one hundred fifteen thousand, one hundred seventeen".