223145500 has 96 divisors (see below), whose sum is σ = 521015040. Its totient is φ = 83246400.

The previous prime is 223145479. The next prime is 223145543. The reversal of 223145500 is 5541322.

It is a super-3 number, since 3×223145500³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 788359 + ... + 788641.

It is an arithmetic number, because the mean of its divisors is an integer number (5427240).

Almost surely, 2^223145500 is an apocalyptic number.

223145500 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 223145500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260507520).

223145500 is an abundant number, since it is smaller than the sum of its proper divisors (297869540).

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

223145500 is a wasteful number, since it uses less digits than its factorization.

223145500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 223145500 is about 14938.0554290041. The cubic root of 223145500 is about 606.5445587407.

Adding to 223145500 its reverse (5541322), we get a palindrome (228686822).

The spelling of 223145500 in words is "two hundred twenty-three million, one hundred forty-five thousand, five hundred".