221355432442 has 8 divisors (see below), whose sum is σ = 349508577600. Its totient is φ = 104852573244.

The previous prime is 221355432407. The next prime is 221355432503. The reversal of 221355432442 is 244234553122.

It is a happy number.

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

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, 2912571442 + ... + 2912571517.

It is an arithmetic number, because the mean of its divisors is an integer number (43688572200).

Almost surely, 2^221355432442 is an apocalyptic number.

221355432442 is a deficient number, since it is larger than the sum of its proper divisors (128153145158).

221355432442 is a wasteful number, since it uses less digits than its factorization.

221355432442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825142980.

The product of its digits is 230400, while the sum is 37.

Adding to 221355432442 its reverse (244234553122), we get a palindrome (465589985564).

The spelling of 221355432442 in words is "two hundred twenty-one billion, three hundred fifty-five million, four hundred thirty-two thousand, four hundred forty-two".