11611216 has 20 divisors (see below), whose sum is σ = 22602100. Its totient is φ = 5778432.

The previous prime is 11611199. The next prime is 11611217. The reversal of 11611216 is 61211611.

It can be written as a sum of positive squares in 2 ways, for example, as 10265616 + 1345600 = 3204^2 + 1160^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11611193 and 11611202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11611217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2080 + ... + 5248.

It is an arithmetic number, because the mean of its divisors is an integer number (1130105).

Almost surely, 2^11611216 is an apocalyptic number.

11611216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11611216 is a deficient number, since it is larger than the sum of its proper divisors (10990884).

11611216 is a wasteful number, since it uses less digits than its factorization.

11611216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

The square root of 11611216 is about 3407.5234408585. The cubic root of 11611216 is about 226.4431745586.

Adding to 11611216 its reverse (61211611), we get a palindrome (72822827).

The spelling of 11611216 in words is "eleven million, six hundred eleven thousand, two hundred sixteen".