5431221233231 has 4 divisors (see below), whose sum is σ = 5431226557992. Its totient is φ = 5431215908472.

The previous prime is 5431221233219. The next prime is 5431221233239. The reversal of 5431221233231 is 1323321221345.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5431221233231 is a prime.

It is a super-2 number, since 2×5431221233231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5431221233239) 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, 599705 + ... + 3349938.

It is an arithmetic number, because the mean of its divisors is an integer number (1357806639498).

Almost surely, 2^{5431221233231} is an apocalyptic number.

5431221233231 is a deficient number, since it is larger than the sum of its proper divisors (5324761).

5431221233231 is a wasteful number, since it uses less digits than its factorization.

5431221233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324760.

The product of its digits is 25920, while the sum is 32.

Adding to 5431221233231 its reverse (1323321221345), we get a palindrome (6754542454576).

The spelling of 5431221233231 in words is "five trillion, four hundred thirty-one billion, two hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-one".