219928671 has 6 divisors (see below), whose sum is σ = 317674760. Its totient is φ = 146619108.

The previous prime is 219928637. The next prime is 219928699. The reversal of 219928671 is 176829912.

It is a de Polignac number, because none of the positive numbers 2^k-219928671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219928271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12218251 + ... + 12218268.

Almost surely, 2^219928671 is an apocalyptic number.

219928671 is a deficient number, since it is larger than the sum of its proper divisors (97746089).

219928671 is a wasteful number, since it uses less digits than its factorization.

219928671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436525 (or 24436522 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 219928671 is about 14829.9922791618. The cubic root of 219928671 is about 603.6158242528.

The spelling of 219928671 in words is "two hundred nineteen million, nine hundred twenty-eight thousand, six hundred seventy-one".