13813217 has 4 divisors (see below), whose sum is σ = 15068976. Its totient is φ = 12557460.

The previous prime is 13813213. The next prime is 13813223. The reversal of 13813217 is 71231831.

13813217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13813217 - 2² = 13813213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13813211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627863 + ... + 627884.

It is an arithmetic number, because the mean of its divisors is an integer number (3767244).

Almost surely, 2^13813217 is an apocalyptic number.

It is an amenable number.

13813217 is a deficient number, since it is larger than the sum of its proper divisors (1255759).

13813217 is a wasteful number, since it uses less digits than its factorization.

13813217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255758.

The product of its digits is 1008, while the sum is 26.

The square root of 13813217 is about 3716.6136468565. The cubic root of 13813217 is about 239.9375821478.

The spelling of 13813217 in words is "thirteen million, eight hundred thirteen thousand, two hundred seventeen".