215770021084841 has 2 divisors, whose sum is σ = 215770021084842. Its totient is φ = 215770021084840.

The previous prime is 215770021084777. The next prime is 215770021084853. The reversal of 215770021084841 is 148480120077512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187723676110441 + 28046344974400 = 13701229^2 + 5295880^2 .

It is a cyclic number.

It is not a de Polignac number, because 215770021084841 - 2⁶ = 215770021084777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215770021084841.

It is not a weakly prime, because it can be changed into another prime (215770021089841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107885010542420 + 107885010542421.

It is an arithmetic number, because the mean of its divisors is an integer number (107885010542421).

Almost surely, 2^{215770021084841} is an apocalyptic number.

It is an amenable number.

215770021084841 is a deficient number, since it is larger than the sum of its proper divisors (1).

215770021084841 is an equidigital number, since it uses as much as digits as its factorization.

215770021084841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1003520, while the sum is 50.

The spelling of 215770021084841 in words is "two hundred fifteen trillion, seven hundred seventy billion, twenty-one million, eighty-four thousand, eight hundred forty-one".