11217471 has 8 divisors (see below), whose sum is σ = 15125040. Its totient is φ = 7394112.

The previous prime is 11217463. The next prime is 11217523. The reversal of 11217471 is 17471211.

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

It is not a de Polignac number, because 11217471 - 2³ = 11217463 is a prime.

It is a super-3 number, since 3×11217471³ (a number of 22 digits) contains 333 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217571) 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, 20740 + ... + 21273.

It is an arithmetic number, because the mean of its divisors is an integer number (1890630).

Almost surely, 2^11217471 is an apocalyptic number.

11217471 is a deficient number, since it is larger than the sum of its proper divisors (3907569).

11217471 is an equidigital number, since it uses as much as digits as its factorization.

11217471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42105.

The product of its digits is 392, while the sum is 24.

The square root of 11217471 is about 3349.2493188773. The cubic root of 11217471 is about 223.8540649680.

Adding to 11217471 its reverse (17471211), we get a palindrome (28688682).

The spelling of 11217471 in words is "eleven million, two hundred seventeen thousand, four hundred seventy-one".