7231463643221 has 2 divisors, whose sum is σ = 7231463643222. Its totient is φ = 7231463643220.

The previous prime is 7231463643161. The next prime is 7231463643223. The reversal of 7231463643221 is 1223463641327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6078621216196 + 1152842427025 = 2465486^2 + 1073705^2 .

It is an emirp because it is prime and its reverse (1223463641327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7231463643221 - 2¹⁰ = 7231463642197 is a prime.

Together with 7231463643223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7231463643223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3615731821610 + 3615731821611.

It is an arithmetic number, because the mean of its divisors is an integer number (3615731821611).

Almost surely, 2^{7231463643221} is an apocalyptic number.

It is an amenable number.

7231463643221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7231463643221 is an equidigital number, since it uses as much as digits as its factorization.

7231463643221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 44.

The spelling of 7231463643221 in words is "seven trillion, two hundred thirty-one billion, four hundred sixty-three million, six hundred forty-three thousand, two hundred twenty-one".