538722281 has 2 divisors, whose sum is σ = 538722282. Its totient is φ = 538722280.

The previous prime is 538722259. The next prime is 538722287. The reversal of 538722281 is 182227835.

538722281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525143056 + 13579225 = 22916^2 + 3685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538722281 is a prime.

It is a super-2 number, since 2×538722281² = 580443392091685922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (538722287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269361140 + 269361141.

It is an arithmetic number, because the mean of its divisors is an integer number (269361141).

Almost surely, 2^538722281 is an apocalyptic number.

It is an amenable number.

538722281 is a deficient number, since it is larger than the sum of its proper divisors (1).

538722281 is an equidigital number, since it uses as much as digits as its factorization.

538722281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 538722281 is about 23210.3916597717. The cubic root of 538722281 is about 813.6825068235.

The spelling of 538722281 in words is "five hundred thirty-eight million, seven hundred twenty-two thousand, two hundred eighty-one".