206315625251 has 2 divisors, whose sum is σ = 206315625252. Its totient is φ = 206315625250.

The previous prime is 206315625239. The next prime is 206315625407. The reversal of 206315625251 is 152526513602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206315625251 - 2¹⁴ = 206315608867 is a prime.

It is a super-2 number, since 2×206315625251² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206315625211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103157812625 + 103157812626.

It is an arithmetic number, because the mean of its divisors is an integer number (103157812626).

Almost surely, 2^206315625251 is an apocalyptic number.

206315625251 is a deficient number, since it is larger than the sum of its proper divisors (1).

206315625251 is an equidigital number, since it uses as much as digits as its factorization.

206315625251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 206315625251 in words is "two hundred six billion, three hundred fifteen million, six hundred twenty-five thousand, two hundred fifty-one".