531250961 has 2 divisors, whose sum is σ = 531250962. Its totient is φ = 531250960.

The previous prime is 531250957. The next prime is 531251009. The reversal of 531250961 is 169052135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527850625 + 3400336 = 22975^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 531250961 - 2² = 531250957 is a prime.

It is not a weakly prime, because it can be changed into another prime (531250061) 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, 265625480 + 265625481.

It is an arithmetic number, because the mean of its divisors is an integer number (265625481).

Almost surely, 2^531250961 is an apocalyptic number.

It is an amenable number.

531250961 is a deficient number, since it is larger than the sum of its proper divisors (1).

531250961 is an equidigital number, since it uses as much as digits as its factorization.

531250961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 531250961 is about 23048.8819902398. The cubic root of 531250961 is about 809.9034386747.

The spelling of 531250961 in words is "five hundred thirty-one million, two hundred fifty thousand, nine hundred sixty-one".