13815161 has 2 divisors, whose sum is σ = 13815162. Its totient is φ = 13815160.

The previous prime is 13815149. The next prime is 13815167. The reversal of 13815161 is 16151831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 891136 = 3595^2 + 944^2 .

It is an emirp because it is prime and its reverse (16151831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13815161 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13815161.

It is not a weakly prime, because it can be changed into another prime (13815167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6907580 + 6907581.

It is an arithmetic number, because the mean of its divisors is an integer number (6907581).

Almost surely, 2^13815161 is an apocalyptic number.

It is an amenable number.

13815161 is a deficient number, since it is larger than the sum of its proper divisors (1).

13815161 is an equidigital number, since it uses as much as digits as its factorization.

13815161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 26.

The square root of 13815161 is about 3716.8751660501. The cubic root of 13815161 is about 239.9488374737.

Adding to 13815161 its reverse (16151831), we get a palindrome (29966992).

The spelling of 13815161 in words is "thirteen million, eight hundred fifteen thousand, one hundred sixty-one".