504240024221 has 2 divisors, whose sum is σ = 504240024222. Its totient is φ = 504240024220.

The previous prime is 504240024193. The next prime is 504240024241. The reversal of 504240024221 is 122420042405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501279576121 + 2960448100 = 708011^2 + 54410^2 .

It is a cyclic number.

It is not a de Polignac number, because 504240024221 - 2³⁰ = 503166282397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504240024241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252120012110 + 252120012111.

It is an arithmetic number, because the mean of its divisors is an integer number (252120012111).

Almost surely, 2^504240024221 is an apocalyptic number.

It is an amenable number.

504240024221 is a deficient number, since it is larger than the sum of its proper divisors (1).

504240024221 is an equidigital number, since it uses as much as digits as its factorization.

504240024221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 504240024221 its reverse (122420042405), we get a palindrome (626660066626).

The spelling of 504240024221 in words is "five hundred four billion, two hundred forty million, twenty-four thousand, two hundred twenty-one".