13815147 has 8 divisors (see below), whose sum is σ = 19389760. Its totient is φ = 8725320.

The previous prime is 13815079. The next prime is 13815149. The reversal of 13815147 is 74151831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13815147 - 2¹⁰ = 13814123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13815149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121129 + ... + 121242.

It is an arithmetic number, because the mean of its divisors is an integer number (2423720).

Almost surely, 2^13815147 is an apocalyptic number.

13815147 is a deficient number, since it is larger than the sum of its proper divisors (5574613).

13815147 is a wasteful number, since it uses less digits than its factorization.

13815147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242393.

The product of its digits is 3360, while the sum is 30.

The square root of 13815147 is about 3716.8732827472. The cubic root of 13815147 is about 239.9487564206.

Adding to 13815147 its reverse (74151831), we get a palindrome (87966978).

The spelling of 13815147 in words is "thirteen million, eight hundred fifteen thousand, one hundred forty-seven".