221940533768 has 12 divisors (see below), whose sum is σ = 416140999245. Its totient is φ = 110969600640.

The previous prime is 221940533753. The next prime is 221940533777. The reversal of 221940533768 is 867335049122.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

221940533768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 190513044484 + 31427489284 = 436478^2 + 177278^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333122.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1249208 + ... + 1415768.

It is a 1-persistent number, because it is pandigital, but 2⋅221940533768 = 443881067536 is not.

Almost surely, 2^221940533768 is an apocalyptic number.

It is an amenable number.

221940533768 is a deficient number, since it is larger than the sum of its proper divisors (194200465477).

221940533768 is an frugal number, since it uses more digits than its factorization.

221940533768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333128 (or 166563 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

Multiplying 221940533768 by its sum of digits (50), we get a square (11097026688400 = 3331220²).

The spelling of 221940533768 in words is "two hundred twenty-one billion, nine hundred forty million, five hundred thirty-three thousand, seven hundred sixty-eight".