531534665 has 8 divisors (see below), whose sum is σ = 675361800. Its totient is φ = 400214272.

The previous prime is 531534659. The next prime is 531534667. The reversal of 531534665 is 566435135.

It can be written as a sum of positive squares in 4 ways, for example, as 241615936 + 289918729 = 15544^2 + 17027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531534665 - 2¹⁰ = 531533641 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (531534667) 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 7 ways as a sum of consecutive naturals, for example, 3126590 + ... + 3126759.

It is an arithmetic number, because the mean of its divisors is an integer number (84420225).

Almost surely, 2^531534665 is an apocalyptic number.

It is an amenable number.

531534665 is a deficient number, since it is larger than the sum of its proper divisors (143827135).

531534665 is a wasteful number, since it uses less digits than its factorization.

531534665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253371.

The product of its digits is 162000, while the sum is 38.

The square root of 531534665 is about 23055.0355670947. The cubic root of 531534665 is about 810.0475839546.

The spelling of 531534665 in words is "five hundred thirty-one million, five hundred thirty-four thousand, six hundred sixty-five".