215223205291 has 2 divisors, whose sum is σ = 215223205292. Its totient is φ = 215223205290.

The previous prime is 215223205277. The next prime is 215223205339. The reversal of 215223205291 is 192502322512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215223205291 - 2¹⁷ = 215223074219 is a prime.

It is not a weakly prime, because it can be changed into another prime (215223205591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107611602645 + 107611602646.

It is an arithmetic number, because the mean of its divisors is an integer number (107611602646).

Almost surely, 2^215223205291 is an apocalyptic number.

215223205291 is a deficient number, since it is larger than the sum of its proper divisors (1).

215223205291 is an equidigital number, since it uses as much as digits as its factorization.

215223205291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 215223205291 in words is "two hundred fifteen billion, two hundred twenty-three million, two hundred five thousand, two hundred ninety-one".