11581317 has 48 divisors (see below), whose sum is σ = 19768320. Its totient is φ = 6458400.

The previous prime is 11581261. The next prime is 11581331. The reversal of 11581317 is 71318511.

11581317 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11581317 - 2⁶ = 11581253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11581337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88342 + ... + 88472.

It is an arithmetic number, because the mean of its divisors is an integer number (411840).

Almost surely, 2^11581317 is an apocalyptic number.

It is an amenable number.

11581317 is a deficient number, since it is larger than the sum of its proper divisors (8187003).

11581317 is a wasteful number, since it uses less digits than its factorization.

11581317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 211 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 11581317 is about 3403.1334090805. The cubic root of 11581317 is about 226.2486429922.

Adding to 11581317 its reverse (71318511), we get a palindrome (82899828).

The spelling of 11581317 in words is "eleven million, five hundred eighty-one thousand, three hundred seventeen".