221662600045 has 8 divisors (see below), whose sum is σ = 266006548224. Its totient is φ = 177322461264.

The previous prime is 221662600031. The next prime is 221662600067. The reversal of 221662600045 is 540006266122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221662600045 - 2⁵ = 221662600013 is a prime.

It is a Duffinian number.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 822729 + ... + 1058398.

It is an arithmetic number, because the mean of its divisors is an integer number (33250818528).

Almost surely, 2^221662600045 is an apocalyptic number.

It is an amenable number.

221662600045 is a deficient number, since it is larger than the sum of its proper divisors (44343948179).

221662600045 is a wasteful number, since it uses less digits than its factorization.

221662600045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904699.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 221662600045 its reverse (540006266122), we get a palindrome (761668866167).

The spelling of 221662600045 in words is "two hundred twenty-one billion, six hundred sixty-two million, six hundred thousand, forty-five".