504420220302421 has 16 divisors (see below), whose sum is σ = 509974777082736. Its totient is φ = 498896098430976.

The previous prime is 504420220302391. The next prime is 504420220302451. The reversal of 504420220302421 is 124203022024405.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (504420220302391) and next prime (504420220302451).

It can be written as a sum of positive squares in 8 ways, for example, as 12852124620196 + 491568095682225 = 3584986^2 + 22171335^2 .

It is a cyclic number.

It is not a de Polignac number, because 504420220302421 - 2³³ = 504411630367829 is a prime.

It is a super-2 number, since 2×504420220302421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504420220302451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2129198251 + ... + 2129435143.

It is an arithmetic number, because the mean of its divisors is an integer number (31873423567671).

Almost surely, 2^{504420220302421} is an apocalyptic number.

It is an amenable number.

504420220302421 is a deficient number, since it is larger than the sum of its proper divisors (5554556780315).

504420220302421 is a wasteful number, since it uses less digits than its factorization.

504420220302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301032.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 504420220302421 its reverse (124203022024405), we get a palindrome (628623242326826).

The spelling of 504420220302421 in words is "five hundred four trillion, four hundred twenty billion, two hundred twenty million, three hundred two thousand, four hundred twenty-one".