205334542157 has 2 divisors, whose sum is σ = 205334542158. Its totient is φ = 205334542156.

The previous prime is 205334542141. The next prime is 205334542163. The reversal of 205334542157 is 751245433502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162942202921 + 42392339236 = 403661^2 + 205894^2 .

It is a cyclic number.

It is not a de Polignac number, because 205334542157 - 2⁴ = 205334542141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205334532157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102667271078 + 102667271079.

It is an arithmetic number, because the mean of its divisors is an integer number (102667271079).

Almost surely, 2^205334542157 is an apocalyptic number.

It is an amenable number.

205334542157 is a deficient number, since it is larger than the sum of its proper divisors (1).

205334542157 is an equidigital number, since it uses as much as digits as its factorization.

205334542157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 41.

Adding to 205334542157 its reverse (751245433502), we get a palindrome (956579975659).

The spelling of 205334542157 in words is "two hundred five billion, three hundred thirty-four million, five hundred forty-two thousand, one hundred fifty-seven".