221441130 has 48 divisors (see below), whose sum is σ = 581054760. Its totient is φ = 58506624.

The previous prime is 221441113. The next prime is 221441131. The reversal of 221441130 is 31144122.

221441130 is a `hidden beast` number, since 221 + 4 + 411 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 143065521 + 78375609 = 11961^2 + 8853^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221441131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477 + ... + 21096.

Almost surely, 2^221441130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221441130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290527380).

221441130 is an abundant number, since it is smaller than the sum of its proper divisors (359613630).

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

221441130 is a wasteful number, since it uses less digits than its factorization.

221441130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22695 (or 22692 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 221441130 is about 14880.8981583774. The cubic root of 221441130 is about 604.9963617931.

Adding to 221441130 its reverse (31144122), we get a palindrome (252585252).

The spelling of 221441130 in words is "two hundred twenty-one million, four hundred forty-one thousand, one hundred thirty".