221324488 has 96 divisors (see below), whose sum is σ = 528595200. Its totient is φ = 85029120.

The previous prime is 221324429. The next prime is 221324489. The reversal of 221324488 is 884423122.

It is not an unprimeable number, because it can be changed into a prime (221324489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 602881 + ... + 603247.

It is an arithmetic number, because the mean of its divisors is an integer number (5506200).

Almost surely, 2^221324488 is an apocalyptic number.

221324488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221324488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264297600).

221324488 is an abundant number, since it is smaller than the sum of its proper divisors (307270712).

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

221324488 is a wasteful number, since it uses less digits than its factorization.

221324488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 476 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 221324488 is about 14876.9784566625. The cubic root of 221324488 is about 604.8901177851.

The spelling of 221324488 in words is "two hundred twenty-one million, three hundred twenty-four thousand, four hundred eighty-eight".