204281712157 has 2 divisors, whose sum is σ = 204281712158. Its totient is φ = 204281712156.

The previous prime is 204281712149. The next prime is 204281712191. The reversal of 204281712157 is 751217182402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203519179161 + 762532996 = 451131^2 + 27614^2 .

It is a cyclic number.

It is not a de Polignac number, because 204281712157 - 2³ = 204281712149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204281712127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102140856078 + 102140856079.

It is an arithmetic number, because the mean of its divisors is an integer number (102140856079).

Almost surely, 2^204281712157 is an apocalyptic number.

It is an amenable number.

204281712157 is a deficient number, since it is larger than the sum of its proper divisors (1).

204281712157 is an equidigital number, since it uses as much as digits as its factorization.

204281712157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

Adding to 204281712157 its reverse (751217182402), we get a palindrome (955498894559).

The spelling of 204281712157 in words is "two hundred four billion, two hundred eighty-one million, seven hundred twelve thousand, one hundred fifty-seven".