205108157 has 2 divisors, whose sum is σ = 205108158. Its totient is φ = 205108156.

The previous prime is 205108109. The next prime is 205108259. The reversal of 205108157 is 751801502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159491641 + 45616516 = 12629^2 + 6754^2 .

It is a cyclic number.

It is not a de Polignac number, because 205108157 - 2⁶ = 205108093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205101157) 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, 102554078 + 102554079.

It is an arithmetic number, because the mean of its divisors is an integer number (102554079).

Almost surely, 2^205108157 is an apocalyptic number.

It is an amenable number.

205108157 is a deficient number, since it is larger than the sum of its proper divisors (1).

205108157 is an equidigital number, since it uses as much as digits as its factorization.

205108157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 205108157 is about 14321.5975715002. The cubic root of 205108157 is about 589.7405322751.

Adding to 205108157 its reverse (751801502), we get a palindrome (956909659).

The spelling of 205108157 in words is "two hundred five million, one hundred eight thousand, one hundred fifty-seven".