102215289857 has 2 divisors, whose sum is σ = 102215289858. Its totient is φ = 102215289856.

The previous prime is 102215289779. The next prime is 102215289859. The reversal of 102215289857 is 758982512201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98489896561 + 3725393296 = 313831^2 + 61036^2 .

It is an emirp because it is prime and its reverse (758982512201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102215289857 - 2¹⁴ = 102215273473 is a prime.

Together with 102215289859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102215289859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51107644928 + 51107644929.

It is an arithmetic number, because the mean of its divisors is an integer number (51107644929).

Almost surely, 2^102215289857 is an apocalyptic number.

It is an amenable number.

102215289857 is a deficient number, since it is larger than the sum of its proper divisors (1).

102215289857 is an equidigital number, since it uses as much as digits as its factorization.

102215289857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 102215289857 in words is "one hundred two billion, two hundred fifteen million, two hundred eighty-nine thousand, eight hundred fifty-seven".