221422000645544 has 16 divisors (see below), whose sum is σ = 433216957785120. Its totient is φ = 105897478569520.

The previous prime is 221422000645493. The next prime is 221422000645577. The reversal of 221422000645544 is 445546000224122.

It is a happy number.

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, 601690218962 + ... + 601690219329.

It is an arithmetic number, because the mean of its divisors is an integer number (27076059861570).

Almost surely, 2^{221422000645544} is an apocalyptic number.

It is an amenable number.

221422000645544 is a deficient number, since it is larger than the sum of its proper divisors (211794957139576).

221422000645544 is a wasteful number, since it uses less digits than its factorization.

221422000645544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203380438320 (or 1203380438316 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 41.

Adding to 221422000645544 its reverse (445546000224122), we get a palindrome (666968000869666).

The spelling of 221422000645544 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, five hundred forty-four".