11506550 has 24 divisors (see below), whose sum is σ = 23348952. Its totient is φ = 4184000.

The previous prime is 11506541. The next prime is 11506567. The reversal of 11506550 is 5560511.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9911 + ... + 11010.

It is an arithmetic number, because the mean of its divisors is an integer number (972873).

Almost surely, 2^11506550 is an apocalyptic number.

11506550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11506550 is an abundant number, since it is smaller than the sum of its proper divisors (11842402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11506550 is a wasteful number, since it uses less digits than its factorization.

11506550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20944 (or 20939 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 11506550 is about 3392.1305989009. The cubic root of 11506550 is about 225.7607173232.

The spelling of 11506550 in words is "eleven million, five hundred six thousand, five hundred fifty".