11500055 has 24 divisors (see below), whose sum is σ = 16298352. Its totient is φ = 7765632.

The previous prime is 11500051. The next prime is 11500057. The reversal of 11500055 is 55000511.

It is not a de Polignac number, because 11500055 - 2² = 11500051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11500051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17564 + ... + 18206.

It is an arithmetic number, because the mean of its divisors is an integer number (679098).

Almost surely, 2^11500055 is an apocalyptic number.

11500055 is a deficient number, since it is larger than the sum of its proper divisors (4798297).

11500055 is an equidigital number, since it uses as much as digits as its factorization.

11500055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 11500055 is about 3391.1731008605. The cubic root of 11500055 is about 225.7182316132.

Adding to 11500055 its reverse (55000511), we get a palindrome (66500566).

The spelling of 11500055 in words is "eleven million, five hundred thousand, fifty-five".