221525041536444 has 12 divisors (see below), whose sum is σ = 516891763585064. Its totient is φ = 73841680512144.

The previous prime is 221525041536289. The next prime is 221525041536499. The reversal of 221525041536444 is 444635140525122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 221525041536393 and 221525041536402.

It is a congruent number.

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, 9230210064007 + ... + 9230210064030.

Almost surely, 2^{221525041536444} is an apocalyptic number.

It is an amenable number.

221525041536444 is an abundant number, since it is smaller than the sum of its proper divisors (295366722048620).

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

221525041536444 is a wasteful number, since it uses less digits than its factorization.

221525041536444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18460420128044 (or 18460420128042 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 48.

The spelling of 221525041536444 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, forty-one million, five hundred thirty-six thousand, four hundred forty-four".