6423530605221 has 4 divisors (see below), whose sum is σ = 8564707473632. Its totient is φ = 4282353736812.

The previous prime is 6423530605187. The next prime is 6423530605253. The reversal of 6423530605221 is 1225060353246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6423530605221 - 2¹⁴ = 6423530588837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6423530605221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423530655221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070588434201 + ... + 1070588434206.

It is an arithmetic number, because the mean of its divisors is an integer number (2141176868408).

Almost surely, 2^{6423530605221} is an apocalyptic number.

It is an amenable number.

6423530605221 is a deficient number, since it is larger than the sum of its proper divisors (2141176868411).

6423530605221 is a wasteful number, since it uses less digits than its factorization.

6423530605221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141176868410.

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 6423530605221 its reverse (1225060353246), we get a palindrome (7648590958467).

The spelling of 6423530605221 in words is "six trillion, four hundred twenty-three billion, five hundred thirty million, six hundred five thousand, two hundred twenty-one".