52455420421 has 2 divisors, whose sum is σ = 52455420422. Its totient is φ = 52455420420.

The previous prime is 52455420397. The next prime is 52455420443. The reversal of 52455420421 is 12402455425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50137479396 + 2317941025 = 223914^2 + 48145^2 .

It is a cyclic number.

It is not a de Polignac number, because 52455420421 - 2²¹ = 52453323269 is a prime.

It is a super-2 number, since 2×52455420421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52455420491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26227710210 + 26227710211.

It is an arithmetic number, because the mean of its divisors is an integer number (26227710211).

Almost surely, 2^52455420421 is an apocalyptic number.

It is an amenable number.

52455420421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52455420421 is an equidigital number, since it uses as much as digits as its factorization.

52455420421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 52455420421 its reverse (12402455425), we get a palindrome (64857875846).

The spelling of 52455420421 in words is "fifty-two billion, four hundred fifty-five million, four hundred twenty thousand, four hundred twenty-one".