221522006026788 has 48 divisors (see below), whose sum is σ = 518390510831424. Its totient is φ = 73625563432960.

The previous prime is 221522006026771. The next prime is 221522006026813. The reversal of 221522006026788 is 887620600225122.

It is a self number, because there is not a number n which added to its sum of digits gives 221522006026788.

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 15 ways as a sum of consecutive naturals, for example, 134666548 + ... + 136301588.

It is an arithmetic number, because the mean of its divisors is an integer number (10799802308988).

Almost surely, 2^{221522006026788} is an apocalyptic number.

It is an amenable number.

221522006026788 is an abundant number, since it is smaller than the sum of its proper divisors (296868504804636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221522006026788 is a wasteful number, since it uses less digits than its factorization.

221522006026788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667932 (or 1667930 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 221522006026788 in words is "two hundred twenty-one trillion, five hundred twenty-two billion, six million, twenty-six thousand, seven hundred eighty-eight".