813431222134327 has 2 divisors, whose sum is σ = 813431222134328. Its totient is φ = 813431222134326.

The previous prime is 813431222134313. The next prime is 813431222134387. The reversal of 813431222134327 is 723431222134318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813431222134327 - 2¹⁹ = 813431221610039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813431222134387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406715611067163 + 406715611067164.

It is an arithmetic number, because the mean of its divisors is an integer number (406715611067164).

Almost surely, 2^{813431222134327} is an apocalyptic number.

813431222134327 is a deficient number, since it is larger than the sum of its proper divisors (1).

813431222134327 is an equidigital number, since it uses as much as digits as its factorization.

813431222134327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 46.

Subtracting from 813431222134327 its reverse (723431222134318), we obtain a palindrome (90000000000009).

The spelling of 813431222134327 in words is "eight hundred thirteen trillion, four hundred thirty-one billion, two hundred twenty-two million, one hundred thirty-four thousand, three hundred twenty-seven".