15641671 has 2 divisors, whose sum is σ = 15641672. Its totient is φ = 15641670.

The previous prime is 15641669. The next prime is 15641707. The reversal of 15641671 is 17614651.

It is a weak prime.

It is an emirp because it is prime and its reverse (17614651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15641671 - 2¹ = 15641669 is a prime.

Together with 15641669, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15641621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820835 + 7820836.

It is an arithmetic number, because the mean of its divisors is an integer number (7820836).

Almost surely, 2^15641671 is an apocalyptic number.

15641671 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641671 is an equidigital number, since it uses as much as digits as its factorization.

15641671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 15641671 is about 3954.9552462702. The cubic root of 15641671 is about 250.0888803974.

The spelling of 15641671 in words is "fifteen million, six hundred forty-one thousand, six hundred seventy-one".