221412233 has 24 divisors (see below), whose sum is σ = 274610952. Its totient is φ = 177375744.

The previous prime is 221412223. The next prime is 221412241. The reversal of 221412233 is 332214122.

It can be written as a sum of positive squares in 4 ways, for example, as 29506624 + 191905609 = 5432^2 + 13853^2 .

It is not a de Polignac number, because 221412233 - 2¹⁸ = 221150089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221412223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129935 + ... + 131627.

It is an arithmetic number, because the mean of its divisors is an integer number (11442123).

Almost surely, 2^221412233 is an apocalyptic number.

It is an amenable number.

221412233 is a deficient number, since it is larger than the sum of its proper divisors (53198719).

221412233 is a wasteful number, since it uses less digits than its factorization.

221412233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1874 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 221412233 is about 14879.9271839616. The cubic root of 221412233 is about 604.9700442787.

Adding to 221412233 its reverse (332214122), we get a palindrome (553626355).

The spelling of 221412233 in words is "two hundred twenty-one million, four hundred twelve thousand, two hundred thirty-three".