13217151 has 4 divisors (see below), whose sum is σ = 17622872. Its totient is φ = 8811432.

The previous prime is 13217137. The next prime is 13217167. The reversal of 13217151 is 15171231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15171231 = 3 ⋅5057077.

It is not a de Polignac number, because 13217151 - 2⁹ = 13216639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13217101) 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, 2202856 + ... + 2202861.

It is an arithmetic number, because the mean of its divisors is an integer number (4405718).

Almost surely, 2^13217151 is an apocalyptic number.

13217151 is a deficient number, since it is larger than the sum of its proper divisors (4405721).

13217151 is an equidigital number, since it uses as much as digits as its factorization.

13217151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4405720.

The product of its digits is 210, while the sum is 21.

The square root of 13217151 is about 3635.5399874021. The cubic root of 13217151 is about 236.4354631135.

Adding to 13217151 its reverse (15171231), we get a palindrome (28388382).

The spelling of 13217151 in words is "thirteen million, two hundred seventeen thousand, one hundred fifty-one".