205371142957 has 2 divisors, whose sum is σ = 205371142958. Its totient is φ = 205371142956.

The previous prime is 205371142897. The next prime is 205371142961. The reversal of 205371142957 is 759241173502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161229553156 + 44141589801 = 401534^2 + 210099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205371142957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205371142357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102685571478 + 102685571479.

It is an arithmetic number, because the mean of its divisors is an integer number (102685571479).

Almost surely, 2^205371142957 is an apocalyptic number.

It is an amenable number.

205371142957 is a deficient number, since it is larger than the sum of its proper divisors (1).

205371142957 is an equidigital number, since it uses as much as digits as its factorization.

205371142957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 205371142957 in words is "two hundred five billion, three hundred seventy-one million, one hundred forty-two thousand, nine hundred fifty-seven".