538305281 has 2 divisors, whose sum is σ = 538305282. Its totient is φ = 538305280.

The previous prime is 538305239. The next prime is 538305301. The reversal of 538305281 is 182503835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272778256 + 265527025 = 16516^2 + 16295^2 .

It is a cyclic number.

It is not a de Polignac number, because 538305281 - 2⁶ = 538305217 is a prime.

It is a super-2 number, since 2×538305281² = 579545151104977922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (538305211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269152640 + 269152641.

It is an arithmetic number, because the mean of its divisors is an integer number (269152641).

Almost surely, 2^538305281 is an apocalyptic number.

It is an amenable number.

538305281 is a deficient number, since it is larger than the sum of its proper divisors (1).

538305281 is an equidigital number, since it uses as much as digits as its factorization.

538305281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 538305281 is about 23201.4068754462. The cubic root of 538305281 is about 813.4725079664.

The spelling of 538305281 in words is "five hundred thirty-eight million, three hundred five thousand, two hundred eighty-one".