204508253881 has 2 divisors, whose sum is σ = 204508253882. Its totient is φ = 204508253880.

The previous prime is 204508253867. The next prime is 204508253903. The reversal of 204508253881 is 188352805402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204470369856 + 37884025 = 452184^2 + 6155^2 .

It is a cyclic number.

It is not a de Polignac number, because 204508253881 - 2⁷ = 204508253753 is a prime.

It is a super-2 number, since 2×204508253881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204508253801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102254126940 + 102254126941.

It is an arithmetic number, because the mean of its divisors is an integer number (102254126941).

Almost surely, 2^204508253881 is an apocalyptic number.

It is an amenable number.

204508253881 is a deficient number, since it is larger than the sum of its proper divisors (1).

204508253881 is an equidigital number, since it uses as much as digits as its factorization.

204508253881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 204508253881 in words is "two hundred four billion, five hundred eight million, two hundred fifty-three thousand, eight hundred eighty-one".