215315053243 has 2 divisors, whose sum is σ = 215315053244. Its totient is φ = 215315053242.

The previous prime is 215315053207. The next prime is 215315053339. The reversal of 215315053243 is 342350513512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215315053243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215315053199 and 215315053208.

It is not a weakly prime, because it can be changed into another prime (215315053043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107657526621 + 107657526622.

It is an arithmetic number, because the mean of its divisors is an integer number (107657526622).

Almost surely, 2^215315053243 is an apocalyptic number.

215315053243 is a deficient number, since it is larger than the sum of its proper divisors (1).

215315053243 is an equidigital number, since it uses as much as digits as its factorization.

215315053243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 215315053243 its reverse (342350513512), we get a palindrome (557665566755).

The spelling of 215315053243 in words is "two hundred fifteen billion, three hundred fifteen million, fifty-three thousand, two hundred forty-three".