220312233 has 6 divisors (see below), whose sum is σ = 318228794. Its totient is φ = 146874816.

The previous prime is 220312187. The next prime is 220312237. The reversal of 220312233 is 332213022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 214681104 + 5631129 = 14652^2 + 2373^2 .

It is not a de Polignac number, because 220312233 - 2¹³ = 220304041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220312237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12239560 + ... + 12239577.

Almost surely, 2^220312233 is an apocalyptic number.

It is an amenable number.

220312233 is a deficient number, since it is larger than the sum of its proper divisors (97916561).

220312233 is a wasteful number, since it uses less digits than its factorization.

220312233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24479143 (or 24479140 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 220312233 is about 14842.9186146122. The cubic root of 220312233 is about 603.9665283046.

Adding to 220312233 its reverse (332213022), we get a palindrome (552525255).

The spelling of 220312233 in words is "two hundred twenty million, three hundred twelve thousand, two hundred thirty-three".