531141665 has 4 divisors (see below), whose sum is σ = 637370004. Its totient is φ = 424913328.

The previous prime is 531141647. The next prime is 531141703. The reversal of 531141665 is 566141135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141158161 + 389983504 = 11881^2 + 19748^2 .

It is a cyclic number.

It is not a de Polignac number, because 531141665 - 2¹⁰ = 531140641 is a prime.

It is a super-2 number, since 2×531141665² = 564222936597944450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53114162 + ... + 53114171.

It is an arithmetic number, because the mean of its divisors is an integer number (159342501).

Almost surely, 2^531141665 is an apocalyptic number.

It is an amenable number.

531141665 is a deficient number, since it is larger than the sum of its proper divisors (106228339).

531141665 is a wasteful number, since it uses less digits than its factorization.

531141665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106228338.

The product of its digits is 10800, while the sum is 32.

The square root of 531141665 is about 23046.5109072935. The cubic root of 531141665 is about 809.8478935031.

The spelling of 531141665 in words is "five hundred thirty-one million, one hundred forty-one thousand, six hundred sixty-five".