421322400253 has 2 divisors, whose sum is σ = 421322400254. Its totient is φ = 421322400252.

The previous prime is 421322400193. The next prime is 421322400269. The reversal of 421322400253 is 352004223124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225854958564 + 195467441689 = 475242^2 + 442117^2 .

It is a cyclic number.

It is not a de Polignac number, because 421322400253 - 2¹³ = 421322392061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421322403253) 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, 210661200126 + 210661200127.

It is an arithmetic number, because the mean of its divisors is an integer number (210661200127).

Almost surely, 2^421322400253 is an apocalyptic number.

It is an amenable number.

421322400253 is a deficient number, since it is larger than the sum of its proper divisors (1).

421322400253 is an equidigital number, since it uses as much as digits as its factorization.

421322400253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 421322400253 its reverse (352004223124), we get a palindrome (773326623377).

The spelling of 421322400253 in words is "four hundred twenty-one billion, three hundred twenty-two million, four hundred thousand, two hundred fifty-three".