221234530 has 32 divisors (see below), whose sum is σ = 440391168. Its totient is φ = 79344000.

The previous prime is 221234501. The next prime is 221234543. The reversal of 221234530 is 35432122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5746 + ... + 21805.

It is an arithmetic number, because the mean of its divisors is an integer number (13762224).

Almost surely, 2^221234530 is an apocalyptic number.

221234530 is a deficient number, since it is larger than the sum of its proper divisors (219156638).

221234530 is a wasteful number, since it uses less digits than its factorization.

221234530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27642.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 221234530 is about 14873.9547531919. The cubic root of 221234530 is about 604.8081535468.

Adding to 221234530 its reverse (35432122), we get a palindrome (256666652).

The spelling of 221234530 in words is "two hundred twenty-one million, two hundred thirty-four thousand, five hundred thirty".