13351681 has 8 divisors (see below), whose sum is σ = 16156800. Its totient is φ = 10771008.

The previous prime is 13351673. The next prime is 13351697. The reversal of 13351681 is 18615331.

13351681 is digitally balanced in base 2 and base 8, because in such bases 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 a cyclic number.

It is not a de Polignac number, because 13351681 - 2³ = 13351673 is a prime.

It is a super-2 number, since 2×13351681² = 356534771051522, which contains 22 as substring.

13351681 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (13351631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55981 + ... + 56218.

It is an arithmetic number, because the mean of its divisors is an integer number (2019600).

Almost surely, 2^13351681 is an apocalyptic number.

It is an amenable number.

13351681 is a deficient number, since it is larger than the sum of its proper divisors (2805119).

13351681 is a wasteful number, since it uses less digits than its factorization.

13351681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112223.

The product of its digits is 2160, while the sum is 28.

The square root of 13351681 is about 3653.9952107248. The cubic root of 13351681 is about 237.2349382677.

The spelling of 13351681 in words is "thirteen million, three hundred fifty-one thousand, six hundred eighty-one".