512020521 has 20 divisors (see below), whose sum is σ = 789547264. Its totient is φ = 330334200.

The previous prime is 512020511. The next prime is 512020543. The reversal of 512020521 is 125020215.

512020521 is a `hidden beast` number, since 5 + 120 + 20 + 521 = 666.

It is not a de Polignac number, because 512020521 - 2⁹ = 512020009 is a prime.

It is a super-2 number, since 2×512020521² = 524330027850222882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 512020494 and 512020503.

It is not an unprimeable number, because it can be changed into a prime (512020511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99445 + ... + 104466.

Almost surely, 2^512020521 is an apocalyptic number.

It is an amenable number.

512020521 is a deficient number, since it is larger than the sum of its proper divisors (277526743).

512020521 is a wasteful number, since it uses less digits than its factorization.

512020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203954 (or 203945 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 512020521 is about 22627.8704477465. The cubic root of 512020521 is about 800.0106878780.

Adding to 512020521 its reverse (125020215), we get a palindrome (637040736).

The spelling of 512020521 in words is "five hundred twelve million, twenty thousand, five hundred twenty-one".