11055681 has 24 divisors (see below), whose sum is σ = 19656000. Its totient is φ = 5831136.

The previous prime is 11055677. The next prime is 11055689. The reversal of 11055681 is 18655011.

It is not a de Polignac number, because 11055681 - 2² = 11055677 is a prime.

It is a super-2 number, since 2×11055681² = 244456164747522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11055689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5931 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^11055681 is an apocalyptic number.

It is an amenable number.

11055681 is a deficient number, since it is larger than the sum of its proper divisors (8600319).

11055681 is a wasteful number, since it uses less digits than its factorization.

11055681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13525 (or 13522 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 11055681 is about 3325.0084210420. The cubic root of 11055681 is about 222.7726305009.

It can be divided in two parts, 1105 and 5681, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 11055681 in words is "eleven million, fifty-five thousand, six hundred eighty-one".