506640531 has 8 divisors (see below), whose sum is σ = 676233360. Its totient is φ = 337404032.

The previous prime is 506640523. The next prime is 506640557. The reversal of 506640531 is 135046605.

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

It is a cyclic number.

It is not a de Polignac number, because 506640531 - 2³ = 506640523 is a prime.

It is a super-3 number, since 3×506640531³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (506640571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85746 + ... + 91463.

It is an arithmetic number, because the mean of its divisors is an integer number (84529170).

Almost surely, 2^506640531 is an apocalyptic number.

506640531 is a deficient number, since it is larger than the sum of its proper divisors (169592829).

506640531 is a wasteful number, since it uses less digits than its factorization.

506640531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178165.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 506640531 is about 22508.6767936278. The cubic root of 506640531 is about 797.1988130332.

The spelling of 506640531 in words is "five hundred six million, six hundred forty thousand, five hundred thirty-one".