215700556271 has 2 divisors, whose sum is σ = 215700556272. Its totient is φ = 215700556270.

The previous prime is 215700556241. The next prime is 215700556277. The reversal of 215700556271 is 172655007512.

It is a happy number.

215700556271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215700556271 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215700556277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107850278135 + 107850278136.

It is an arithmetic number, because the mean of its divisors is an integer number (107850278136).

Almost surely, 2^215700556271 is an apocalyptic number.

215700556271 is a deficient number, since it is larger than the sum of its proper divisors (1).

215700556271 is an equidigital number, since it uses as much as digits as its factorization.

215700556271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 215700556271 in words is "two hundred fifteen billion, seven hundred million, five hundred fifty-six thousand, two hundred seventy-one".