531556241 has 2 divisors, whose sum is σ = 531556242. Its totient is φ = 531556240.

The previous prime is 531556219. The next prime is 531556261. The reversal of 531556241 is 142655135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529920400 + 1635841 = 23020^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 531556241 - 2⁶ = 531556177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531556198 and 531556207.

It is not a weakly prime, because it can be changed into another prime (531556261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265778120 + 265778121.

It is an arithmetic number, because the mean of its divisors is an integer number (265778121).

Almost surely, 2^531556241 is an apocalyptic number.

It is an amenable number.

531556241 is a deficient number, since it is larger than the sum of its proper divisors (1).

531556241 is an equidigital number, since it uses as much as digits as its factorization.

531556241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 531556241 is about 23055.5034861527. The cubic root of 531556241 is about 810.0585442621.

The spelling of 531556241 in words is "five hundred thirty-one million, five hundred fifty-six thousand, two hundred forty-one".