231402332321 has 2 divisors, whose sum is σ = 231402332322. Its totient is φ = 231402332320.

The previous prime is 231402332267. The next prime is 231402332323. The reversal of 231402332321 is 123233204132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138309610000 + 93092722321 = 371900^2 + 305111^2 .

It is a cyclic number.

It is not a de Polignac number, because 231402332321 - 2⁶ = 231402332257 is a prime.

Together with 231402332323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231402332323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115701166160 + 115701166161.

It is an arithmetic number, because the mean of its divisors is an integer number (115701166161).

Almost surely, 2^231402332321 is an apocalyptic number.

It is an amenable number.

231402332321 is a deficient number, since it is larger than the sum of its proper divisors (1).

231402332321 is an equidigital number, since it uses as much as digits as its factorization.

231402332321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 231402332321 its reverse (123233204132), we get a palindrome (354635536453).

The spelling of 231402332321 in words is "two hundred thirty-one billion, four hundred two million, three hundred thirty-two thousand, three hundred twenty-one".