223720530 has 48 divisors (see below), whose sum is σ = 590188032. Its totient is φ = 54234400.

The previous prime is 223720501. The next prime is 223720547. The reversal of 223720530 is 35027322.

223720530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 223720530.

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, 27186 + ... + 34445.

It is an arithmetic number, because the mean of its divisors is an integer number (12295584).

Almost surely, 2^223720530 is an apocalyptic number.

223720530 is an abundant number, since it is smaller than the sum of its proper divisors (366467502).

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

223720530 is a wasteful number, since it uses less digits than its factorization.

223720530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61663 (or 61652 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 223720530 is about 14957.2901957540. The cubic root of 223720530 is about 607.0651191687.

Adding to 223720530 its reverse (35027322), we get a palindrome (258747852).

The spelling of 223720530 in words is "two hundred twenty-three million, seven hundred twenty thousand, five hundred thirty".