15680441 has 6 divisors (see below), whose sum is σ = 18240570. Its totient is φ = 13440336.

The previous prime is 15680407. The next prime is 15680447. The reversal of 15680441 is 14408651.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 38416 = 3955^2 + 196^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15680441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15680447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159956 + ... + 160053.

It is an arithmetic number, because the mean of its divisors is an integer number (3040095).

Almost surely, 2^15680441 is an apocalyptic number.

It is an amenable number.

15680441 is a deficient number, since it is larger than the sum of its proper divisors (2560129).

15680441 is an equidigital number, since it uses as much as digits as its factorization.

15680441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320023 (or 320016 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 15680441 is about 3959.8536589122. The cubic root of 15680441 is about 250.2953363018.

The spelling of 15680441 in words is "fifteen million, six hundred eighty thousand, four hundred forty-one".