531056143 has 2 divisors, whose sum is σ = 531056144. Its totient is φ = 531056142.

The previous prime is 531056129. The next prime is 531056167. The reversal of 531056143 is 341650135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531056143 - 2¹⁷ = 530925071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531056843) 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, 265528071 + 265528072.

It is an arithmetic number, because the mean of its divisors is an integer number (265528072).

Almost surely, 2^531056143 is an apocalyptic number.

531056143 is a deficient number, since it is larger than the sum of its proper divisors (1).

531056143 is an equidigital number, since it uses as much as digits as its factorization.

531056143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 531056143 is about 23044.6554107455. The cubic root of 531056143 is about 809.8044251695.

The spelling of 531056143 in words is "five hundred thirty-one million, fifty-six thousand, one hundred forty-three".