13553118 has 48 divisors (see below), whose sum is σ = 32273280. Its totient is φ = 4091472.

The previous prime is 13553101. The next prime is 13553123. The reversal of 13553118 is 81135531.

It is a junction number, because it is equal to n+sod(n) for n = 13553091 and 13553100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7005 + ... + 8727.

It is an arithmetic number, because the mean of its divisors is an integer number (672360).

Almost surely, 2^13553118 is an apocalyptic number.

13553118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13553118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16136640).

13553118 is an abundant number, since it is smaller than the sum of its proper divisors (18720162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13553118 is a wasteful number, since it uses less digits than its factorization.

13553118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1770 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 13553118 is about 3681.4559619803. The cubic root of 13553118 is about 238.4220437967.

Adding to 13553118 its reverse (81135531), we get a palindrome (94688649).

The spelling of 13553118 in words is "thirteen million, five hundred fifty-three thousand, one hundred eighteen".