224208872781 has 8 divisors (see below), whose sum is σ = 299017511520. Its totient is φ = 149436407952.

The previous prime is 224208872761. The next prime is 224208872807. The reversal of 224208872781 is 187278802422.

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

It is not a de Polignac number, because 224208872781 - 2⁷ = 224208872653 is a prime.

It is a super-2 number, since 2×224208872781² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224208872761) 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, 9029011 + ... + 9053808.

It is an arithmetic number, because the mean of its divisors is an integer number (37377188940).

Almost surely, 2^224208872781 is an apocalyptic number.

It is an amenable number.

224208872781 is a deficient number, since it is larger than the sum of its proper divisors (74808638739).

224208872781 is a wasteful number, since it uses less digits than its factorization.

224208872781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18086955.

The product of its (nonzero) digits is 1605632, while the sum is 51.

The spelling of 224208872781 in words is "two hundred twenty-four billion, two hundred eight million, eight hundred seventy-two thousand, seven hundred eighty-one".