223128005 has 8 divisors (see below), whose sum is σ = 267967224. Its totient is φ = 178360000.

The previous prime is 223127999. The next prime is 223128007. The reversal of 223128005 is 500821322.

223128005 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 4 ways, for example, as 18809569 + 204318436 = 4337^2 + 14294^2 .

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

It is not a de Polignac number, because 223128005 - 2²⁶ = 156019141 is a prime.

It is a super-3 number, since 3×223128005³ (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 a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223128007) 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, 10646 + ... + 23655.

It is an arithmetic number, because the mean of its divisors is an integer number (33495903).

Almost surely, 2^223128005 is an apocalyptic number.

It is an amenable number.

223128005 is a deficient number, since it is larger than the sum of its proper divisors (44839219).

223128005 is a wasteful number, since it uses less digits than its factorization.

223128005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35607.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 223128005 is about 14937.4698326055. The cubic root of 223128005 is about 606.5287069394.

Adding to 223128005 its reverse (500821322), we get a palindrome (723949327).

The spelling of 223128005 in words is "two hundred twenty-three million, one hundred twenty-eight thousand, five".