11351681 has 8 divisors (see below), whose sum is σ = 12450144. Its totient is φ = 10264320.

The previous prime is 11351663. The next prime is 11351687. The reversal of 11351681 is 18615311.

11351681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11351681 - 2⁶ = 11351617 is a prime.

It is a super-2 number, since 2×11351681² = 257721323051522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11351681.

It is not an unprimeable number, because it can be changed into a prime (11351687) 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 7 ways as a sum of consecutive naturals, for example, 551 + ... + 4796.

It is an arithmetic number, because the mean of its divisors is an integer number (1556268).

Almost surely, 2^11351681 is an apocalyptic number.

11351681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11351681 is a deficient number, since it is larger than the sum of its proper divisors (1098463).

11351681 is a wasteful number, since it uses less digits than its factorization.

11351681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551.

The product of its digits is 720, while the sum is 26.

The square root of 11351681 is about 3369.2255786753. The cubic root of 11351681 is about 224.7432858137.

Adding to 11351681 its reverse (18615311), we get a palindrome (29966992).

The spelling of 11351681 in words is "eleven million, three hundred fifty-one thousand, six hundred eighty-one".