505506021 has 8 divisors (see below), whose sum is σ = 674774880. Its totient is φ = 336620592.

The previous prime is 505505977. The next prime is 505506037. The reversal of 505506021 is 120605505.

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

It is not a de Polignac number, because 505506021 - 2¹⁰ = 505504997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505505982 and 505506000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505506821) 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, 92766 + ... + 98063.

It is an arithmetic number, because the mean of its divisors is an integer number (84346860).

Almost surely, 2^505506021 is an apocalyptic number.

It is an amenable number.

505506021 is a deficient number, since it is larger than the sum of its proper divisors (169268859).

505506021 is a wasteful number, since it uses less digits than its factorization.

505506021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191715.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 505506021 is about 22483.4610547398. The cubic root of 505506021 is about 796.6033178699.

The spelling of 505506021 in words is "five hundred five million, five hundred six thousand, twenty-one".