221440133 has 2 divisors, whose sum is σ = 221440134. Its totient is φ = 221440132.

The previous prime is 221440127. The next prime is 221440169. The reversal of 221440133 is 331044122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136025569 + 85414564 = 11663^2 + 9242^2 .

It is a cyclic number.

It is not a de Polignac number, because 221440133 - 2¹⁴ = 221423749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221440103) 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 as a sum of consecutive naturals, namely, 110720066 + 110720067.

It is an arithmetic number, because the mean of its divisors is an integer number (110720067).

Almost surely, 2^221440133 is an apocalyptic number.

It is an amenable number.

221440133 is a deficient number, since it is larger than the sum of its proper divisors (1).

221440133 is an equidigital number, since it uses as much as digits as its factorization.

221440133 is an odious number, because the sum of its binary digits is odd.

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

The square root of 221440133 is about 14880.8646590176. The cubic root of 221440133 is about 604.9954538283.

Adding to 221440133 its reverse (331044122), we get a palindrome (552484255).

The spelling of 221440133 in words is "two hundred twenty-one million, four hundred forty thousand, one hundred thirty-three".