506031521 has 4 divisors (see below), whose sum is σ = 507658944. Its totient is φ = 504404100.

The previous prime is 506031517. The next prime is 506031529. The reversal of 506031521 is 125130605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 506031521 - 2² = 506031517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506031529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813245 + ... + 813866.

It is an arithmetic number, because the mean of its divisors is an integer number (126914736).

Almost surely, 2^506031521 is an apocalyptic number.

It is an amenable number.

506031521 is a deficient number, since it is larger than the sum of its proper divisors (1627423).

506031521 is a wasteful number, since it uses less digits than its factorization.

506031521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627422.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 506031521 is about 22495.1443871783. The cubic root of 506031521 is about 796.8792592385.

The spelling of 506031521 in words is "five hundred six million, thirty-one thousand, five hundred twenty-one".