221854998887 has 8 divisors (see below), whose sum is σ = 228379753152. Its totient is φ = 215358069600.

The previous prime is 221854998857. The next prime is 221854998917. The reversal of 221854998887 is 788899458122.

It is an interprime number because it is at equal distance from previous prime (221854998857) and next prime (221854998917).

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 221854998887 - 2⁶ = 221854998823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221854998887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221854998857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6940064 + ... + 6971957.

It is an arithmetic number, because the mean of its divisors is an integer number (28547469144).

Almost surely, 2^221854998887 is an apocalyptic number.

221854998887 is a deficient number, since it is larger than the sum of its proper divisors (6524754265).

221854998887 is a wasteful number, since it uses less digits than its factorization.

221854998887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13912489.

The product of its digits is 185794560, while the sum is 71.

The spelling of 221854998887 in words is "two hundred twenty-one billion, eight hundred fifty-four million, nine hundred ninety-eight thousand, eight hundred eighty-seven".