223128881 has 6 divisors (see below), whose sum is σ = 227979570. Its totient is φ = 218379296.

The previous prime is 223128863. The next prime is 223128883. The reversal of 223128881 is 188821322.

223128881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 88360000 = 11609^2 + 9400^2 .

It is not a de Polignac number, because 223128881 - 2²² = 218934577 is a prime.

It is a super-3 number, since 3×223128881³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223128883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48296 + ... + 52713.

It is an arithmetic number, because the mean of its divisors is an integer number (37996595).

Almost surely, 2^223128881 is an apocalyptic number.

It is an amenable number.

223128881 is a deficient number, since it is larger than the sum of its proper divisors (4850689).

223128881 is an equidigital number, since it uses as much as digits as its factorization.

223128881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101103 (or 101056 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 223128881 is about 14937.4991548117. The cubic root of 223128881 is about 606.5295006818.

The spelling of 223128881 in words is "two hundred twenty-three million, one hundred twenty-eight thousand, eight hundred eighty-one".