13550436 has 48 divisors (see below), whose sum is σ = 36090880. Its totient is φ = 4393440.

The previous prime is 13550419. The next prime is 13550437. The reversal of 13550436 is 63405531.

13550436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13550436² = 367228631580192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13550437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2301 + ... + 5691.

Almost surely, 2^13550436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13550436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18045440).

13550436 is an abundant number, since it is smaller than the sum of its proper divisors (22540444).

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

13550436 is a wasteful number, since it uses less digits than its factorization.

13550436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441 (or 3433 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 13550436 is about 3681.0916858997. The cubic root of 13550436 is about 238.4063158019.

Adding to 13550436 its reverse (63405531), we get a palindrome (76955967).

The spelling of 13550436 in words is "thirteen million, five hundred fifty thousand, four hundred thirty-six".