204819481 has 2 divisors, whose sum is σ = 204819482. Its totient is φ = 204819480.

The previous prime is 204819437. The next prime is 204819499. The reversal of 204819481 is 184918402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126337600 + 78481881 = 11240^2 + 8859^2 .

It is a cyclic number.

It is not a de Polignac number, because 204819481 - 2⁷ = 204819353 is a prime.

It is a super-2 number, since 2×204819481² = 83902039594218722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204819481.

It is not a weakly prime, because it can be changed into another prime (204816481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102409740 + 102409741.

It is an arithmetic number, because the mean of its divisors is an integer number (102409741).

Almost surely, 2^204819481 is an apocalyptic number.

It is an amenable number.

204819481 is a deficient number, since it is larger than the sum of its proper divisors (1).

204819481 is an equidigital number, since it uses as much as digits as its factorization.

204819481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 204819481 is about 14311.5156779427. The cubic root of 204819481 is about 589.4637289341.

The spelling of 204819481 in words is "two hundred four million, eight hundred nineteen thousand, four hundred eighty-one".