223247520 has 144 divisors (see below), whose sum is σ = 766289160. Its totient is φ = 59185152.

The previous prime is 223247513. The next prime is 223247533. The reversal of 223247520 is 25742322.

223247520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 218211984 + 5035536 = 14772^2 + 2244^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×223247520³ (a number of 26 digits) contains 333 as substring.

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, 329422 + ... + 330098.

Almost surely, 2^223247520 is an apocalyptic number.

223247520 is a gapful number since it is divisible by the number (20) 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 223247520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383144580).

223247520 is an abundant number, since it is smaller than the sum of its proper divisors (543041640).

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

223247520 is a wasteful number, since it uses less digits than its factorization.

223247520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 223247520 is about 14941.4698072178. The cubic root of 223247520 is about 606.6369801250.

Adding to 223247520 its reverse (25742322), we get a palindrome (248989842).

The spelling of 223247520 in words is "two hundred twenty-three million, two hundred forty-seven thousand, five hundred twenty".