5231223421 has 4 divisors (see below), whose sum is σ = 5316981244. Its totient is φ = 5145465600.

The previous prime is 5231223419. The next prime is 5231223449. The reversal of 5231223421 is 1243221325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1403326521 + 3827896900 = 37461^2 + 61870^2 .

It is a cyclic number.

It is not a de Polignac number, because 5231223421 - 2¹ = 5231223419 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 (5231223451) 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 in 3 ways as a sum of consecutive naturals, for example, 42878820 + ... + 42878941.

It is an arithmetic number, because the mean of its divisors is an integer number (1329245311).

Almost surely, 2^5231223421 is an apocalyptic number.

It is an amenable number.

5231223421 is a deficient number, since it is larger than the sum of its proper divisors (85757823).

5231223421 is an equidigital number, since it uses as much as digits as its factorization.

5231223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85757822.

The product of its digits is 2880, while the sum is 25.

The square root of 5231223421 is about 72327.1969662865. The cubic root of 5231223421 is about 1735.9388508912.

Adding to 5231223421 its reverse (1243221325), we get a palindrome (6474444746).

The spelling of 5231223421 in words is "five billion, two hundred thirty-one million, two hundred twenty-three thousand, four hundred twenty-one".