221544030 has 16 divisors (see below), whose sum is σ = 531705744. Its totient is φ = 59078400.

The previous prime is 221544019. The next prime is 221544031. The reversal of 221544030 is 30445122.

It is a junction number, because it is equal to n+sod(n) for n = 221543988 and 221544006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221544031) 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 7 ways as a sum of consecutive naturals, for example, 3692371 + ... + 3692430.

It is an arithmetic number, because the mean of its divisors is an integer number (33231609).

Almost surely, 2^221544030 is an apocalyptic number.

221544030 is an abundant number, since it is smaller than the sum of its proper divisors (310161714).

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

221544030 is a wasteful number, since it uses less digits than its factorization.

221544030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7384811.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 221544030 is about 14884.3552094137. The cubic root of 221544030 is about 605.0900578548.

Adding to 221544030 its reverse (30445122), we get a palindrome (251989152).

The spelling of 221544030 in words is "two hundred twenty-one million, five hundred forty-four thousand, thirty".