13551861 has 8 divisors (see below), whose sum is σ = 18235360. Its totient is φ = 8951472.

The previous prime is 13551859. The next prime is 13551869. The reversal of 13551861 is 16815531.

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

It is not a de Polignac number, because 13551861 - 2¹ = 13551859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13551869) 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, 20395 + ... + 21048.

It is an arithmetic number, because the mean of its divisors is an integer number (2279420).

Almost surely, 2^13551861 is an apocalyptic number.

It is an amenable number.

13551861 is a deficient number, since it is larger than the sum of its proper divisors (4683499).

13551861 is a wasteful number, since it uses less digits than its factorization.

13551861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41555.

The product of its digits is 3600, while the sum is 30.

The square root of 13551861 is about 3681.2852375224. The cubic root of 13551861 is about 238.4146726571.

The spelling of 13551861 in words is "thirteen million, five hundred fifty-one thousand, eight hundred sixty-one".