421050644253 has 6 divisors (see below), whose sum is σ = 608184263934. Its totient is φ = 280700429496.

The previous prime is 421050644219. The next prime is 421050644293. The reversal of 421050644253 is 352446050124.

421050644253 is a `hidden beast` number, since 4 + 2 + 1 + 0 + 5 + 0 + 644 + 2 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 364474216089 + 56576428164 = 603717^2 + 237858^2 .

It is not a de Polignac number, because 421050644253 - 2¹⁰ = 421050643229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421050644293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23391702450 + ... + 23391702467.

It is an arithmetic number, because the mean of its divisors is an integer number (101364043989).

Almost surely, 2^421050644253 is an apocalyptic number.

It is an amenable number.

421050644253 is a deficient number, since it is larger than the sum of its proper divisors (187133619681).

421050644253 is a wasteful number, since it uses less digits than its factorization.

421050644253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46783404923 (or 46783404920 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 421050644253 its reverse (352446050124), we get a palindrome (773496694377).

The spelling of 421050644253 in words is "four hundred twenty-one billion, fifty million, six hundred forty-four thousand, two hundred fifty-three".