531552521 has 2 divisors, whose sum is σ = 531552522. Its totient is φ = 531552520.

The previous prime is 531552499. The next prime is 531552523. The reversal of 531552521 is 125255135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274399225 + 257153296 = 16565^2 + 16036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531552521 is a prime.

Together with 531552523, 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 (531552523) 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, 265776260 + 265776261.

It is an arithmetic number, because the mean of its divisors is an integer number (265776261).

Almost surely, 2^531552521 is an apocalyptic number.

It is an amenable number.

531552521 is a deficient number, since it is larger than the sum of its proper divisors (1).

531552521 is an equidigital number, since it uses as much as digits as its factorization.

531552521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7500, while the sum is 29.

The square root of 531552521 is about 23055.4228111306. The cubic root of 531552521 is about 810.0566545751.

The spelling of 531552521 in words is "five hundred thirty-one million, five hundred fifty-two thousand, five hundred twenty-one".