13551911 has 4 divisors (see below), whose sum is σ = 13627800. Its totient is φ = 13476024.

The previous prime is 13551869. The next prime is 13551913. The reversal of 13551911 is 11915531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13551911 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 (13551913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37676 + ... + 38033.

It is an arithmetic number, because the mean of its divisors is an integer number (3406950).

Almost surely, 2^13551911 is an apocalyptic number.

13551911 is a deficient number, since it is larger than the sum of its proper divisors (75889).

13551911 is an equidigital number, since it uses as much as digits as its factorization.

13551911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75888.

The product of its digits is 675, while the sum is 26.

The square root of 13551911 is about 3681.2920286226. The cubic root of 13551911 is about 238.4149658694.

The spelling of 13551911 in words is "thirteen million, five hundred fifty-one thousand, nine hundred eleven".