223305500 has 72 divisors (see below), whose sum is σ = 536211312. Its totient is φ = 81180000.

The previous prime is 223305491. The next prime is 223305503. The reversal of 223305500 is 5503322.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223305503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58655 + ... + 62345.

Almost surely, 2^223305500 is an apocalyptic number.

223305500 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 223305500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268105656).

223305500 is an abundant number, since it is smaller than the sum of its proper divisors (312905812).

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

223305500 is a wasteful number, since it uses less digits than its factorization.

223305500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3709 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 223305500 is about 14943.4099187568. The cubic root of 223305500 is about 606.6894924927.

Adding to 223305500 its reverse (5503322), we get a palindrome (228808822).

The spelling of 223305500 in words is "two hundred twenty-three million, three hundred five thousand, five hundred".