531139733 has 2 divisors, whose sum is σ = 531139734. Its totient is φ = 531139732.

The previous prime is 531139729. The next prime is 531139747. The reversal of 531139733 is 337931135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343805764 + 187333969 = 18542^2 + 13687^2 .

It is a cyclic number.

It is not a de Polignac number, because 531139733 - 2² = 531139729 is a prime.

It is a super-2 number, since 2×531139733² = 564218831942622578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531139693 and 531139702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531139793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265569866 + 265569867.

It is an arithmetic number, because the mean of its divisors is an integer number (265569867).

Almost surely, 2^531139733 is an apocalyptic number.

It is an amenable number.

531139733 is a deficient number, since it is larger than the sum of its proper divisors (1).

531139733 is an equidigital number, since it uses as much as digits as its factorization.

531139733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25515, while the sum is 35.

The square root of 531139733 is about 23046.4689920170. The cubic root of 531139733 is about 809.8469115754.

The spelling of 531139733 in words is "five hundred thirty-one million, one hundred thirty-nine thousand, seven hundred thirty-three".