13553881 has 4 divisors (see below), whose sum is σ = 14786064. Its totient is φ = 12321700.

The previous prime is 13553867. The next prime is 13553909. The reversal of 13553881 is 18835531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13553881 - 2⁷ = 13553753 is a prime.

It is a super-2 number, since 2×13553881² = 367415380324322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13553801) 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, 616075 + ... + 616096.

It is an arithmetic number, because the mean of its divisors is an integer number (3696516).

Almost surely, 2^13553881 is an apocalyptic number.

13553881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13553881 is a deficient number, since it is larger than the sum of its proper divisors (1232183).

13553881 is a wasteful number, since it uses less digits than its factorization.

13553881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232182.

The product of its digits is 14400, while the sum is 34.

The square root of 13553881 is about 3681.5595880007. The cubic root of 13553881 is about 238.4265178620.

The spelling of 13553881 in words is "thirteen million, five hundred fifty-three thousand, eight hundred eighty-one".