221768330481 has 12 divisors (see below), whose sum is σ = 320455699200. Its totient is φ = 147788476920.

The previous prime is 221768330417. The next prime is 221768330527. The reversal of 221768330481 is 184033867122.

221768330481 is a `hidden beast` number, since 2 + 21 + 76 + 83 + 3 + 0 + 481 = 666.

221768330481 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 221768330481 - 2⁶ = 221768330417 is a prime.

It is a super-2 number, since 2×221768330481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221768331481) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4731781 + ... + 4778418.

It is an arithmetic number, because the mean of its divisors is an integer number (26704641600).

Almost surely, 2^221768330481 is an apocalyptic number.

It is an amenable number.

221768330481 is a deficient number, since it is larger than the sum of its proper divisors (98687368719).

221768330481 is a wasteful number, since it uses less digits than its factorization.

221768330481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9512796 (or 9512793 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 221768330481 in words is "two hundred twenty-one billion, seven hundred sixty-eight million, three hundred thirty thousand, four hundred eighty-one".