215322240247 has 2 divisors, whose sum is σ = 215322240248. Its totient is φ = 215322240246.

The previous prime is 215322240179. The next prime is 215322240277. The reversal of 215322240247 is 742042223512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215322240247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215322240277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107661120123 + 107661120124.

It is an arithmetic number, because the mean of its divisors is an integer number (107661120124).

Almost surely, 2^215322240247 is an apocalyptic number.

215322240247 is a deficient number, since it is larger than the sum of its proper divisors (1).

215322240247 is an equidigital number, since it uses as much as digits as its factorization.

215322240247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 34.

Adding to 215322240247 its reverse (742042223512), we get a palindrome (957364463759).

The spelling of 215322240247 in words is "two hundred fifteen billion, three hundred twenty-two million, two hundred forty thousand, two hundred forty-seven".