13815047 has 2 divisors, whose sum is σ = 13815048. Its totient is φ = 13815046.

The previous prime is 13815037. The next prime is 13815059. The reversal of 13815047 is 74051831.

13815047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13815047 - 2¹⁴ = 13798663 is a prime.

It is a super-2 number, since 2×13815047² = 381711047224418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13815017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6907523 + 6907524.

It is an arithmetic number, because the mean of its divisors is an integer number (6907524).

Almost surely, 2^13815047 is an apocalyptic number.

13815047 is a deficient number, since it is larger than the sum of its proper divisors (1).

13815047 is an equidigital number, since it uses as much as digits as its factorization.

13815047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 13815047 is about 3716.8598305559. The cubic root of 13815047 is about 239.9481774683.

Adding to 13815047 its reverse (74051831), we get a palindrome (87866878).

The spelling of 13815047 in words is "thirteen million, eight hundred fifteen thousand, forty-seven".