505000521 has 16 divisors (see below), whose sum is σ = 792158400. Its totient is φ = 316862784.

The previous prime is 505000511. The next prime is 505000523. The reversal of 505000521 is 125000505.

It is not a de Polignac number, because 505000521 - 2⁷ = 505000393 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 505000494 and 505000503.

It is not an unprimeable number, because it can be changed into a prime (505000523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549651 + ... + 550568.

It is an arithmetic number, because the mean of its divisors is an integer number (49509900).

Almost surely, 2^505000521 is an apocalyptic number.

505000521 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

505000521 is a deficient number, since it is larger than the sum of its proper divisors (287157879).

505000521 is a wasteful number, since it uses less digits than its factorization.

505000521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100245 (or 1100239 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 505000521 is about 22472.2166463391. The cubic root of 505000521 is about 796.3376980348.

It can be divided in two parts, 505000 and 521, that added together give a square (505521 = 711²).

The spelling of 505000521 in words is "five hundred five million, five hundred twenty-one", and thus it is an aban number.