221022645634 has 8 divisors (see below), whose sum is σ = 378895963968. Its totient is φ = 94723990980.

The previous prime is 221022645617. The next prime is 221022645659. The reversal of 221022645634 is 436546220122.

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

It is a junction number, because it is equal to n+sod(n) for n = 221022645593 and 221022645602.

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, 7893665902 + ... + 7893665929.

It is an arithmetic number, because the mean of its divisors is an integer number (47361995496).

Almost surely, 2^221022645634 is an apocalyptic number.

221022645634 is a deficient number, since it is larger than the sum of its proper divisors (157873318334).

221022645634 is a wasteful number, since it uses less digits than its factorization.

221022645634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15787331840.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 221022645634 its reverse (436546220122), we get a palindrome (657568865756).

The spelling of 221022645634 in words is "two hundred twenty-one billion, twenty-two million, six hundred forty-five thousand, six hundred thirty-four".