506686481 has 8 divisors (see below), whose sum is σ = 604247424. Its totient is φ = 415419840.

The previous prime is 506686441. The next prime is 506686489. The reversal of 506686481 is 184686605.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506686481 is a prime.

It is a super-2 number, since 2×506686481² = 513462380056326722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506686489) 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, 1573400 + ... + 1573721.

It is an arithmetic number, because the mean of its divisors is an integer number (75530928).

Almost surely, 2^506686481 is an apocalyptic number.

It is an amenable number.

506686481 is a deficient number, since it is larger than the sum of its proper divisors (97560943).

506686481 is a wasteful number, since it uses less digits than its factorization.

506686481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147151.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 506686481 is about 22509.6974879717. The cubic root of 506686481 is about 797.2229130777. Note that the first 3 decimals are identical.

The spelling of 506686481 in words is "five hundred six million, six hundred eighty-six thousand, four hundred eighty-one".