221023230 has 64 divisors (see below), whose sum is σ = 540546048. Its totient is φ = 57830400.

The previous prime is 221023217. The next prime is 221023241. The reversal of 221023230 is 32320122.

221023230 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 439159 + ... + 439661.

It is an arithmetic number, because the mean of its divisors is an integer number (8446032).

Almost surely, 2^221023230 is an apocalyptic number.

221023230 is an abundant number, since it is smaller than the sum of its proper divisors (319522818).

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

221023230 is a wasteful number, since it uses less digits than its factorization.

221023230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 221023230 is about 14866.8500362383. The cubic root of 221023230 is about 604.6155424593.

Adding to 221023230 its reverse (32320122), we get a palindrome (253343352).

The spelling of 221023230 in words is "two hundred twenty-one million, twenty-three thousand, two hundred thirty".