15840113 has 2 divisors, whose sum is σ = 15840114. Its totient is φ = 15840112.

The previous prime is 15840109. The next prime is 15840193. The reversal of 15840113 is 31104851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8479744 + 7360369 = 2912^2 + 2713^2 .

It is an emirp because it is prime and its reverse (31104851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15840113 - 2² = 15840109 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15840103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7920056 + 7920057.

It is an arithmetic number, because the mean of its divisors is an integer number (7920057).

Almost surely, 2^15840113 is an apocalyptic number.

It is an amenable number.

15840113 is a deficient number, since it is larger than the sum of its proper divisors (1).

15840113 is an equidigital number, since it uses as much as digits as its factorization.

15840113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 15840113 is about 3979.9639445603. The cubic root of 15840113 is about 251.1420443282.

Adding to 15840113 its reverse (31104851), we get a palindrome (46944964).

The spelling of 15840113 in words is "fifteen million, eight hundred forty thousand, one hundred thirteen".