11220552 has 128 divisors (see below), whose sum is σ = 36691200. Its totient is φ = 3110400.

The previous prime is 11220551. The next prime is 11220553. The reversal of 11220552 is 25502211.

11220552 is a `hidden beast` number, since 112 + 2 + 0 + 552 = 666.

It is an interprime number because it is at equal distance from previous prime (11220551) and next prime (11220553).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11220551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61902 + ... + 62082.

It is an arithmetic number, because the mean of its divisors is an integer number (286650).

Almost surely, 2^11220552 is an apocalyptic number.

11220552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11220552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18345600).

11220552 is an abundant number, since it is smaller than the sum of its proper divisors (25470648).

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

11220552 is a wasteful number, since it uses less digits than its factorization.

11220552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 11220552 is about 3349.7092411133. The cubic root of 11220552 is about 223.8745577404.

Adding to 11220552 its reverse (25502211), we get a palindrome (36722763).

It can be divided in two parts, 11220 and 552, that multiplied together give a triangular number (6193440 = T₃₅₁₉).

The spelling of 11220552 in words is "eleven million, two hundred twenty thousand, five hundred fifty-two".