531868481 has 2 divisors, whose sum is σ = 531868482. Its totient is φ = 531868480.

The previous prime is 531868471. The next prime is 531868487. The reversal of 531868481 is 184868135.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449058481 + 82810000 = 21191^2 + 9100^2 .

It is a cyclic number.

It is not a de Polignac number, because 531868481 - 2⁶ = 531868417 is a prime.

It is a super-2 number, since 2×531868481² = 565768162162494722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (531868487) 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, 265934240 + 265934241.

It is an arithmetic number, because the mean of its divisors is an integer number (265934241).

Almost surely, 2^531868481 is an apocalyptic number.

It is an amenable number.

531868481 is a deficient number, since it is larger than the sum of its proper divisors (1).

531868481 is an equidigital number, since it uses as much as digits as its factorization.

531868481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 44.

The square root of 531868481 is about 23062.2739772122. The cubic root of 531868481 is about 810.2171246416.

The spelling of 531868481 in words is "five hundred thirty-one million, eight hundred sixty-eight thousand, four hundred eighty-one".