15680161 has 4 divisors (see below), whose sum is σ = 17920192. Its totient is φ = 13440132.

The previous prime is 15680153. The next prime is 15680167. The reversal of 15680161 is 16108651.

15680161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16108651 = 13 ⋅1239127.

It is a cyclic number.

It is not a de Polignac number, because 15680161 - 2³ = 15680153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15680167) 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, 1120005 + ... + 1120018.

It is an arithmetic number, because the mean of its divisors is an integer number (4480048).

Almost surely, 2^15680161 is an apocalyptic number.

It is an amenable number.

15680161 is a deficient number, since it is larger than the sum of its proper divisors (2240031).

15680161 is an equidigital number, since it uses as much as digits as its factorization.

15680161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240030.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 15680161 is about 3959.8183039124. The cubic root of 15680161 is about 250.2938464817.

The spelling of 15680161 in words is "fifteen million, six hundred eighty thousand, one hundred sixty-one".