204308163481 has 2 divisors, whose sum is σ = 204308163482. Its totient is φ = 204308163480.

The previous prime is 204308163469. The next prime is 204308163529. The reversal of 204308163481 is 184361803402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203499329881 + 808833600 = 451109^2 + 28440^2 .

It is a cyclic number.

It is not a de Polignac number, because 204308163481 - 2²⁷ = 204173945753 is a prime.

It is a super-2 number, since 2×204308163481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204308160481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102154081740 + 102154081741.

It is an arithmetic number, because the mean of its divisors is an integer number (102154081741).

Almost surely, 2^204308163481 is an apocalyptic number.

It is an amenable number.

204308163481 is a deficient number, since it is larger than the sum of its proper divisors (1).

204308163481 is an equidigital number, since it uses as much as digits as its factorization.

204308163481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 40.

Adding to 204308163481 its reverse (184361803402), we get a palindrome (388669966883).

The spelling of 204308163481 in words is "two hundred four billion, three hundred eight million, one hundred sixty-three thousand, four hundred eighty-one".