221106576556 has 6 divisors (see below), whose sum is σ = 386936508980. Its totient is φ = 110553288276.

The previous prime is 221106576539. The next prime is 221106576599. The reversal of 221106576556 is 655675601122.

It is a super-2 number, since 2×221106576556² (a number of 23 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 27638322066 + ... + 27638322073.

Almost surely, 2^221106576556 is an apocalyptic number.

It is an amenable number.

221106576556 is a deficient number, since it is larger than the sum of its proper divisors (165829932424).

221106576556 is a wasteful number, since it uses less digits than its factorization.

221106576556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55276644143 (or 55276644141 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 221106576556 in words is "two hundred twenty-one billion, one hundred six million, five hundred seventy-six thousand, five hundred fifty-six".