11221550 has 48 divisors (see below), whose sum is σ = 22096800. Its totient is φ = 4233600.

The previous prime is 11221549. The next prime is 11221559. The reversal of 11221550 is 5512211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102896 + ... + 103004.

It is an arithmetic number, because the mean of its divisors is an integer number (460350).

Almost surely, 2^11221550 is an apocalyptic number.

11221550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11221550 is a deficient number, since it is larger than the sum of its proper divisors (10875250).

11221550 is a wasteful number, since it uses less digits than its factorization.

11221550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 11221550 is about 3349.8582059544. The cubic root of 11221550 is about 223.8811949713.

Adding to 11221550 its reverse (5512211), we get a palindrome (16733761).

The spelling of 11221550 in words is "eleven million, two hundred twenty-one thousand, five hundred fifty".