221324442 has 8 divisors (see below), whose sum is σ = 442648896. Its totient is φ = 73774812.

The previous prime is 221324429. The next prime is 221324489. The reversal of 221324442 is 244423122.

It is a sphenic number, since it is the product of 3 distinct primes.

221324442 is an admirable number.

It is a super-2 number, since 2×221324442² = 97969017253222728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18443698 + ... + 18443709.

It is an arithmetic number, because the mean of its divisors is an integer number (55331112).

Almost surely, 2^221324442 is an apocalyptic number.

221324442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221324442 is a wasteful number, since it uses less digits than its factorization.

221324442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36887412.

The product of its digits is 3072, while the sum is 24.

The square root of 221324442 is about 14876.9769106496. The cubic root of 221324442 is about 604.8900758783.

Adding to 221324442 its reverse (244423122), we get a palindrome (465747564).

The spelling of 221324442 in words is "two hundred twenty-one million, three hundred twenty-four thousand, four hundred forty-two".