531450521 has 6 divisors (see below), whose sum is σ = 618218010. Its totient is φ = 455528976.

The previous prime is 531450509. The next prime is 531450527. The reversal of 531450521 is 125054135.

It can be written as a sum of positive squares in only one way, i.e., 417793600 + 113656921 = 20440^2 + 10661^2 .

It is a de Polignac number, because none of the positive numbers 2^k-531450521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531450527) 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 in 5 ways as a sum of consecutive naturals, for example, 5422916 + ... + 5423013.

It is an arithmetic number, because the mean of its divisors is an integer number (103036335).

Almost surely, 2^531450521 is an apocalyptic number.

It is an amenable number.

531450521 is a deficient number, since it is larger than the sum of its proper divisors (86767489).

531450521 is a wasteful number, since it uses less digits than its factorization.

531450521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10845943 (or 10845936 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 531450521 is about 23053.2106440730. The cubic root of 531450521 is about 810.0048371402.

The spelling of 531450521 in words is "five hundred thirty-one million, four hundred fifty thousand, five hundred twenty-one".