13213147 has 4 divisors (see below), whose sum is σ = 13262176. Its totient is φ = 13164120.

The previous prime is 13213139. The next prime is 13213153. The reversal of 13213147 is 74131231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13213147 - 2³ = 13213139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13213127) 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, 24108 + ... + 24649.

It is an arithmetic number, because the mean of its divisors is an integer number (3315544).

Almost surely, 2^13213147 is an apocalyptic number.

13213147 is a deficient number, since it is larger than the sum of its proper divisors (49029).

13213147 is an equidigital number, since it uses as much as digits as its factorization.

13213147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49028.

The product of its digits is 504, while the sum is 22.

The square root of 13213147 is about 3634.9892709608. The cubic root of 13213147 is about 236.4115854713.

Adding to 13213147 its reverse (74131231), we get a palindrome (87344378).

The spelling of 13213147 in words is "thirteen million, two hundred thirteen thousand, one hundred forty-seven".