215103602252857 has 2 divisors, whose sum is σ = 215103602252858. Its totient is φ = 215103602252856.

The previous prime is 215103602252743. The next prime is 215103602252887. The reversal of 215103602252857 is 758252206301512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215070760114681 + 32842138176 = 14665291^2 + 181224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215103602252857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215103602252857.

It is not a weakly prime, because it can be changed into another prime (215103602252887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107551801126428 + 107551801126429.

It is an arithmetic number, because the mean of its divisors is an integer number (107551801126429).

Almost surely, 2^{215103602252857} is an apocalyptic number.

It is an amenable number.

215103602252857 is a deficient number, since it is larger than the sum of its proper divisors (1).

215103602252857 is an equidigital number, since it uses as much as digits as its factorization.

215103602252857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 215103602252857 in words is "two hundred fifteen trillion, one hundred three billion, six hundred two million, two hundred fifty-two thousand, eight hundred fifty-seven".