421266036533 has 2 divisors, whose sum is σ = 421266036534. Its totient is φ = 421266036532.

The previous prime is 421266036523. The next prime is 421266036551. The reversal of 421266036533 is 335630662124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366856741969 + 54409294564 = 605687^2 + 233258^2 .

It is a cyclic number.

It is not a de Polignac number, because 421266036533 - 2⁶ = 421266036469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421266036523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210633018266 + 210633018267.

It is an arithmetic number, because the mean of its divisors is an integer number (210633018267).

Almost surely, 2^421266036533 is an apocalyptic number.

It is an amenable number.

421266036533 is a deficient number, since it is larger than the sum of its proper divisors (1).

421266036533 is an equidigital number, since it uses as much as digits as its factorization.

421266036533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 41.

Adding to 421266036533 its reverse (335630662124), we get a palindrome (756896698657).

The spelling of 421266036533 in words is "four hundred twenty-one billion, two hundred sixty-six million, thirty-six thousand, five hundred thirty-three".