208115221825387 has 2 divisors, whose sum is σ = 208115221825388. Its totient is φ = 208115221825386.

The previous prime is 208115221825339. The next prime is 208115221825439. The reversal of 208115221825387 is 783528122511802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208115221825387 is a prime.

It is not a weakly prime, because it can be changed into another prime (208115221835387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104057610912693 + 104057610912694.

It is an arithmetic number, because the mean of its divisors is an integer number (104057610912694).

Almost surely, 2^{208115221825387} is an apocalyptic number.

208115221825387 is a deficient number, since it is larger than the sum of its proper divisors (1).

208115221825387 is an equidigital number, since it uses as much as digits as its factorization.

208115221825387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4300800, while the sum is 55.

The spelling of 208115221825387 in words is "two hundred eight trillion, one hundred fifteen billion, two hundred twenty-one million, eight hundred twenty-five thousand, three hundred eighty-seven".