221422000645545 has 48 divisors (see below), whose sum is σ = 436358170804608. Its totient is φ = 95267280944640.

The previous prime is 221422000645493. The next prime is 221422000645577. The reversal of 221422000645545 is 545546000224122.

It is a happy number.

221422000645545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221422000645545 - 2¹² = 221422000641449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221422000645497 and 221422000645506.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8860411701 + ... + 8860436690.

It is an arithmetic number, because the mean of its divisors is an integer number (9090795225096).

Almost surely, 2^{221422000645545} is an apocalyptic number.

It is an amenable number.

221422000645545 is a deficient number, since it is larger than the sum of its proper divisors (214936170159063).

221422000645545 is a wasteful number, since it uses less digits than its factorization.

221422000645545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17720848430 (or 17720848423 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 42.

Adding to 221422000645545 its reverse (545546000224122), we get a palindrome (766968000869667).

The spelling of 221422000645545 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, five hundred forty-five".