13551611 has 4 divisors (see below), whose sum is σ = 13568352. Its totient is φ = 13534872.

The previous prime is 13551599. The next prime is 13551649. The reversal of 13551611 is 11615531.

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

It is a cyclic number.

It is not a de Polignac number, because 13551611 - 2¹⁸ = 13289467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13551661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7091 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (3392088).

Almost surely, 2^13551611 is an apocalyptic number.

13551611 is a deficient number, since it is larger than the sum of its proper divisors (16741).

13551611 is an equidigital number, since it uses as much as digits as its factorization.

13551611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16740.

The product of its digits is 450, while the sum is 23.

The square root of 13551611 is about 3681.2512818334. The cubic root of 13551611 is about 238.4132065845.

The spelling of 13551611 in words is "thirteen million, five hundred fifty-one thousand, six hundred eleven".