11155550 has 24 divisors (see below), whose sum is σ = 23714256. Its totient is φ = 3824640.

The previous prime is 11155549. The next prime is 11155561. The reversal of 11155550 is 5555111.

It is a happy number.

11155550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 15587 + ... + 16286.

It is an arithmetic number, because the mean of its divisors is an integer number (988094).

Almost surely, 2^11155550 is an apocalyptic number.

11155550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11155550 is an abundant number, since it is smaller than the sum of its proper divisors (12558706).

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

11155550 is a wasteful number, since it uses less digits than its factorization.

11155550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31892 (or 31887 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 11155550 is about 3339.9925149617. The cubic root of 11155550 is about 223.4414095360.

The spelling of 11155550 in words is "eleven million, one hundred fifty-five thousand, five hundred fifty".