531144124949 has 2 divisors, whose sum is σ = 531144124950. Its totient is φ = 531144124948.

The previous prime is 531144124921. The next prime is 531144124997. The reversal of 531144124949 is 949421441135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330000844849 + 201143280100 = 574457^2 + 448490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531144124949 is a prime.

It is a super-2 number, since 2×531144124949² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531144124349) 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, 265572062474 + 265572062475.

It is an arithmetic number, because the mean of its divisors is an integer number (265572062475).

Almost surely, 2^531144124949 is an apocalyptic number.

It is an amenable number.

531144124949 is a deficient number, since it is larger than the sum of its proper divisors (1).

531144124949 is an equidigital number, since it uses as much as digits as its factorization.

531144124949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The spelling of 531144124949 in words is "five hundred thirty-one billion, one hundred forty-four million, one hundred twenty-four thousand, nine hundred forty-nine".