531930281 has 2 divisors, whose sum is σ = 531930282. Its totient is φ = 531930280.

The previous prime is 531930233. The next prime is 531930283. The reversal of 531930281 is 182039135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514155625 + 17774656 = 22675^2 + 4216^2 .

It is a cyclic number.

It is not a de Polignac number, because 531930281 - 2¹⁴ = 531913897 is a prime.

It is a super-2 number, since 2×531930281² = 565899647689477922, which contains 22 as substring.

Together with 531930283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531930283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265965140 + 265965141.

It is an arithmetic number, because the mean of its divisors is an integer number (265965141).

Almost surely, 2^531930281 is an apocalyptic number.

It is an amenable number.

531930281 is a deficient number, since it is larger than the sum of its proper divisors (1).

531930281 is an equidigital number, since it uses as much as digits as its factorization.

531930281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 531930281 is about 23063.6137888233. The cubic root of 531930281 is about 810.2485042532.

The spelling of 531930281 in words is "five hundred thirty-one million, nine hundred thirty thousand, two hundred eighty-one".