6423231221 has 4 divisors (see below), whose sum is σ = 7007161344. Its totient is φ = 5839301100.

The previous prime is 6423231211. The next prime is 6423231239. The reversal of 6423231221 is 1221323246.

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 a cyclic number.

It is not a de Polignac number, because 6423231221 - 2¹⁰ = 6423230197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423231211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291965045 + ... + 291965066.

It is an arithmetic number, because the mean of its divisors is an integer number (1751790336).

Almost surely, 2^6423231221 is an apocalyptic number.

It is an amenable number.

6423231221 is a deficient number, since it is larger than the sum of its proper divisors (583930123).

6423231221 is a wasteful number, since it uses less digits than its factorization.

6423231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583930122.

The product of its digits is 3456, while the sum is 26.

The square root of 6423231221 is about 80145.0636096822. The cubic root of 6423231221 is about 1858.8792744618.

Adding to 6423231221 its reverse (1221323246), we get a palindrome (7644554467).

The spelling of 6423231221 in words is "six billion, four hundred twenty-three million, two hundred thirty-one thousand, two hundred twenty-one".