11220616 has 16 divisors (see below), whose sum is σ = 22951440. Its totient is φ = 5100240.

The previous prime is 11220553. The next prime is 11220623. The reversal of 11220616 is 61602211.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11220593 and 11220602.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63666 + ... + 63841.

It is an arithmetic number, because the mean of its divisors is an integer number (1434465).

Almost surely, 2^11220616 is an apocalyptic number.

11220616 is the 1791-st centered heptagonal number.

It is an amenable number.

11220616 is an abundant number, since it is smaller than the sum of its proper divisors (11730824).

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

11220616 is a wasteful number, since it uses less digits than its factorization.

11220616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127524 (or 127520 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 11220616 is about 3349.7187941677. The cubic root of 11220616 is about 223.8749833862.

Adding to 11220616 its reverse (61602211), we get a palindrome (72822827).

The spelling of 11220616 in words is "eleven million, two hundred twenty thousand, six hundred sixteen".