405223212540491 has 2 divisors, whose sum is σ = 405223212540492. Its totient is φ = 405223212540490.

The previous prime is 405223212540479. The next prime is 405223212540521. The reversal of 405223212540491 is 194045212322504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405223212540491 - 2⁶ = 405223212540427 is a prime.

It is not a weakly prime, because it can be changed into another prime (405223215540491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202611606270245 + 202611606270246.

It is an arithmetic number, because the mean of its divisors is an integer number (202611606270246).

Almost surely, 2^{405223212540491} is an apocalyptic number.

405223212540491 is a deficient number, since it is larger than the sum of its proper divisors (1).

405223212540491 is an equidigital number, since it uses as much as digits as its factorization.

405223212540491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 44.

Adding to 405223212540491 its reverse (194045212322504), we get a palindrome (599268424862995).

The spelling of 405223212540491 in words is "four hundred five trillion, two hundred twenty-three billion, two hundred twelve million, five hundred forty thousand, four hundred ninety-one".