512212520 has 16 divisors (see below), whose sum is σ = 1152478260. Its totient is φ = 204884992.

The previous prime is 512212513. The next prime is 512212541. The reversal of 512212520 is 25212215.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 464574916 + 47637604 = 21554^2 + 6902^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 512212492 and 512212501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6402617 + ... + 6402696.

Almost surely, 2^512212520 is an apocalyptic number.

It is an amenable number.

512212520 is an abundant number, since it is smaller than the sum of its proper divisors (640265740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512212520 is a wasteful number, since it uses less digits than its factorization.

512212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805324 (or 12805320 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 512212520 is about 22632.1125836719. The cubic root of 512212520 is about 800.1106721889.

Adding to 512212520 its reverse (25212215), we get a palindrome (537424735).

The spelling of 512212520 in words is "five hundred twelve million, two hundred twelve thousand, five hundred twenty".