223121330 has 16 divisors (see below), whose sum is σ = 401808600. Its totient is φ = 89206272.

The previous prime is 223121287. The next prime is 223121333. The reversal of 223121330 is 33121322.

It can be written as a sum of positive squares in 4 ways, for example, as 192904321 + 30217009 = 13889^2 + 5497^2 .

It is a super-3 number, since 3×223121330³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 223121299 and 223121308.

It is not an unprimeable number, because it can be changed into a prime (223121333) 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, 25346 + ... + 32994.

Almost surely, 2^223121330 is an apocalyptic number.

223121330 is a deficient number, since it is larger than the sum of its proper divisors (178687270).

223121330 is a wasteful number, since it uses less digits than its factorization.

223121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10573.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 223121330 is about 14937.2463995209. The cubic root of 223121330 is about 606.5226586631.

Adding to 223121330 its reverse (33121322), we get a palindrome (256242652).

The spelling of 223121330 in words is "two hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty".