205054501425181 has 2 divisors, whose sum is σ = 205054501425182. Its totient is φ = 205054501425180.

The previous prime is 205054501425121. The next prime is 205054501425223. The reversal of 205054501425181 is 181524105450502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194839024325625 + 10215477099556 = 13958475^2 + 3196166^2 .

It is a cyclic number.

It is not a de Polignac number, because 205054501425181 - 2³⁹ = 204504745611293 is a prime.

It is a super-2 number, since 2×205054501425181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205054501425121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102527250712590 + 102527250712591.

It is an arithmetic number, because the mean of its divisors is an integer number (102527250712591).

Almost surely, 2^{205054501425181} is an apocalyptic number.

It is an amenable number.

205054501425181 is a deficient number, since it is larger than the sum of its proper divisors (1).

205054501425181 is an equidigital number, since it uses as much as digits as its factorization.

205054501425181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320000, while the sum is 43.

Adding to 205054501425181 its reverse (181524105450502), we get a palindrome (386578606875683).

The spelling of 205054501425181 in words is "two hundred five trillion, fifty-four billion, five hundred one million, four hundred twenty-five thousand, one hundred eighty-one".