223523424 has 72 divisors (see below), whose sum is σ = 638564472. Its totient is φ = 74165760.

The previous prime is 223523383. The next prime is 223523441. The reversal of 223523424 is 424325322.

It is a happy number.

223523424 is a `hidden beast` number, since 2 + 235 + 2 + 3 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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, 65439 + ... + 68769.

It is an arithmetic number, because the mean of its divisors is an integer number (8868951).

Almost surely, 2^223523424 is an apocalyptic number.

223523424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223523424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319282236).

223523424 is an abundant number, since it is smaller than the sum of its proper divisors (415041048).

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

223523424 is a wasteful number, since it uses less digits than its factorization.

223523424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580 (or 3569 counting only the distinct ones).

The product of its digits is 11520, while the sum is 27.

The square root of 223523424 is about 14950.6997829533. The cubic root of 223523424 is about 606.8867845666.

Adding to 223523424 its reverse (424325322), we get a palindrome (647848746).

The spelling of 223523424 in words is "two hundred twenty-three million, five hundred twenty-three thousand, four hundred twenty-four".