11517255 has 16 divisors (see below), whose sum is σ = 20475360. Its totient is φ = 6142464.

The previous prime is 11517241. The next prime is 11517257. The reversal of 11517255 is 55271511.

It is not a de Polignac number, because 11517255 - 2⁴ = 11517239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11517257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42522 + ... + 42791.

It is an arithmetic number, because the mean of its divisors is an integer number (1279710).

Almost surely, 2^11517255 is an apocalyptic number.

11517255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11517255 is a deficient number, since it is larger than the sum of its proper divisors (8958105).

11517255 is an equidigital number, since it uses as much as digits as its factorization.

11517255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85327 (or 85321 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 11517255 is about 3393.7081489132. The cubic root of 11517255 is about 225.8307070072.

Adding to 11517255 its reverse (55271511), we get a palindrome (66788766).

The spelling of 11517255 in words is "eleven million, five hundred seventeen thousand, two hundred fifty-five".