13555224 has 48 divisors (see below), whose sum is σ = 37229400. Its totient is φ = 4454784.

The previous prime is 13555187. The next prime is 13555231. The reversal of 13555224 is 42255531.

It is a happy number.

13555224 is a `hidden beast` number, since 135 + 5 + 522 + 4 = 666.

13555224 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3967 + ... + 6545.

Almost surely, 2^13555224 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 13555224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18614700).

13555224 is an abundant number, since it is smaller than the sum of its proper divisors (23674176).

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

13555224 is a wasteful number, since it uses less digits than its factorization.

13555224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664 (or 2657 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 13555224 is about 3681.7419790094. The cubic root of 13555224 is about 238.4343925128.

The spelling of 13555224 in words is "thirteen million, five hundred fifty-five thousand, two hundred twenty-four".