213285170617 has 2 divisors, whose sum is σ = 213285170618. Its totient is φ = 213285170616.

The previous prime is 213285170587. The next prime is 213285170717. The reversal of 213285170617 is 716071582312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148333589881 + 64951580736 = 385141^2 + 254856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213285170617 is a prime.

It is not a weakly prime, because it can be changed into another prime (213285170717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106642585308 + 106642585309.

It is an arithmetic number, because the mean of its divisors is an integer number (106642585309).

Almost surely, 2^213285170617 is an apocalyptic number.

It is an amenable number.

213285170617 is a deficient number, since it is larger than the sum of its proper divisors (1).

213285170617 is an equidigital number, since it uses as much as digits as its factorization.

213285170617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 213285170617 in words is "two hundred thirteen billion, two hundred eighty-five million, one hundred seventy thousand, six hundred seventeen".