524412221 has 2 divisors, whose sum is σ = 524412222. Its totient is φ = 524412220.

The previous prime is 524412197. The next prime is 524412223. The reversal of 524412221 is 122214425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282609721 + 241802500 = 16811^2 + 15550^2 .

It is a cyclic number.

It is not a de Polignac number, because 524412221 - 2²² = 520217917 is a prime.

Together with 524412223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (524412223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262206110 + 262206111.

It is an arithmetic number, because the mean of its divisors is an integer number (262206111).

Almost surely, 2^524412221 is an apocalyptic number.

It is an amenable number.

524412221 is a deficient number, since it is larger than the sum of its proper divisors (1).

524412221 is an equidigital number, since it uses as much as digits as its factorization.

524412221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 23.

The square root of 524412221 is about 22900.0484933984. The cubic root of 524412221 is about 806.4131504376.

Adding to 524412221 its reverse (122214425), we get a palindrome (646626646).

The spelling of 524412221 in words is "five hundred twenty-four million, four hundred twelve thousand, two hundred twenty-one".