221383660556 has 12 divisors (see below), whose sum is σ = 410210900568. Its totient is φ = 104180546112.

The previous prime is 221383660523. The next prime is 221383660559. The reversal of 221383660556 is 655066383122.

221383660556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221383660556² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221383660556.

It is not an unprimeable number, because it can be changed into a prime (221383660559) 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 3 ways as a sum of consecutive naturals, for example, 1627820966 + ... + 1627821101.

It is an arithmetic number, because the mean of its divisors is an integer number (34184241714).

Almost surely, 2^221383660556 is an apocalyptic number.

It is an amenable number.

221383660556 is a deficient number, since it is larger than the sum of its proper divisors (188827240012).

221383660556 is a wasteful number, since it uses less digits than its factorization.

221383660556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255642088 (or 3255642086 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 221383660556 in words is "two hundred twenty-one billion, three hundred eighty-three million, six hundred sixty thousand, five hundred fifty-six".