506521081 has 8 divisors (see below), whose sum is σ = 555375744. Its totient is φ = 458134320.

The previous prime is 506521073. The next prime is 506521087. The reversal of 506521081 is 180125605.

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 506521081 - 2³ = 506521073 is a prime.

It is a super-2 number, since 2×506521081² = 513127210994817122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (506521087) 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, 114705 + ... + 119038.

It is an arithmetic number, because the mean of its divisors is an integer number (69421968).

Almost surely, 2^506521081 is an apocalyptic number.

It is an amenable number.

506521081 is a deficient number, since it is larger than the sum of its proper divisors (48854663).

506521081 is a wasteful number, since it uses less digits than its factorization.

506521081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233951.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 506521081 is about 22506.0232160193. The cubic root of 506521081 is about 797.1361565887.

Adding to 506521081 its reverse (180125605), we get a palindrome (686646686).

The spelling of 506521081 in words is "five hundred six million, five hundred twenty-one thousand, eighty-one".