11220615 has 48 divisors (see below), whose sum is σ = 22464000. Its totient is φ = 5075136.

The previous prime is 11220553. The next prime is 11220623. The reversal of 11220615 is 51602211.

It is not a de Polignac number, because 11220615 - 2⁶ = 11220551 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 56286 + ... + 56484.

It is an arithmetic number, because the mean of its divisors is an integer number (468000).

Almost surely, 2^11220615 is an apocalyptic number.

11220615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11220615 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

11220615 is a wasteful number, since it uses less digits than its factorization.

11220615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 11220615 is about 3349.7186449014. The cubic root of 11220615 is about 223.8749767355.

Adding to 11220615 its reverse (51602211), we get a palindrome (62822826).

The spelling of 11220615 in words is "eleven million, two hundred twenty thousand, six hundred fifteen".