221435041 has 6 divisors (see below), whose sum is σ = 223208610. Its totient is φ = 219675456.

The previous prime is 221435033. The next prime is 221435051. The reversal of 221435041 is 140534122.

It can be written as a sum of positive squares in only one way, i.e., 177822225 + 43612816 = 13335^2 + 6604^2 .

It is not a de Polignac number, because 221435041 - 2³ = 221435033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221435021) 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, 9265 + ... + 22993.

It is an arithmetic number, because the mean of its divisors is an integer number (37201435).

Almost surely, 2^221435041 is an apocalyptic number.

It is an amenable number.

221435041 is a deficient number, since it is larger than the sum of its proper divisors (1773569).

221435041 is an equidigital number, since it uses as much as digits as its factorization.

221435041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13983 (or 13856 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 221435041 is about 14880.6935658255. The cubic root of 221435041 is about 604.9908165170.

Adding to 221435041 its reverse (140534122), we get a palindrome (361969163).

The spelling of 221435041 in words is "two hundred twenty-one million, four hundred thirty-five thousand, forty-one".