13551243 has 4 divisors (see below), whose sum is σ = 18068328. Its totient is φ = 9034160.

The previous prime is 13551233. The next prime is 13551319. The reversal of 13551243 is 34215531.

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 13551243 - 2¹⁰ = 13550219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13551233) 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, 2258538 + ... + 2258543.

It is an arithmetic number, because the mean of its divisors is an integer number (4517082).

Almost surely, 2^13551243 is an apocalyptic number.

13551243 is a deficient number, since it is larger than the sum of its proper divisors (4517085).

13551243 is an equidigital number, since it uses as much as digits as its factorization.

13551243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517084.

The product of its digits is 1800, while the sum is 24.

The square root of 13551243 is about 3681.2012984894. The cubic root of 13551243 is about 238.4110484929.

Adding to 13551243 its reverse (34215531), we get a palindrome (47766774).

The spelling of 13551243 in words is "thirteen million, five hundred fifty-one thousand, two hundred forty-three".