221423302442 has 8 divisors (see below), whose sum is σ = 334250463396. Its totient is φ = 110006481312.

The previous prime is 221423302393. The next prime is 221423302459. The reversal of 221423302442 is 244203324122.

It can be written as a sum of positive squares in 2 ways, for example, as 182893930921 + 38529371521 = 427661^2 + 196289^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352584563 + ... + 352585190.

Almost surely, 2^221423302442 is an apocalyptic number.

221423302442 is a deficient number, since it is larger than the sum of its proper divisors (112827160954).

221423302442 is a wasteful number, since it uses less digits than its factorization.

221423302442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705169912.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 221423302442 its reverse (244203324122), we get a palindrome (465626626564).

The spelling of 221423302442 in words is "two hundred twenty-one billion, four hundred twenty-three million, three hundred two thousand, four hundred forty-two".