232420221431 has 2 divisors, whose sum is σ = 232420221432. Its totient is φ = 232420221430.

The previous prime is 232420221413. The next prime is 232420221457. The reversal of 232420221431 is 134122024232.

Together with previous prime (232420221413) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (232420221457) can be obtained adding 232420221431 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232420221431 is a prime.

It is a super-2 number, since 2×232420221431² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 232420221431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232420221931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116210110715 + 116210110716.

It is an arithmetic number, because the mean of its divisors is an integer number (116210110716).

Almost surely, 2^232420221431 is an apocalyptic number.

232420221431 is a deficient number, since it is larger than the sum of its proper divisors (1).

232420221431 is an equidigital number, since it uses as much as digits as its factorization.

232420221431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 232420221431 its reverse (134122024232), we get a palindrome (366542245663).

The spelling of 232420221431 in words is "two hundred thirty-two billion, four hundred twenty million, two hundred twenty-one thousand, four hundred thirty-one".