512523640 has 16 divisors (see below), whose sum is σ = 1153178280. Its totient is φ = 205009440.

The previous prime is 512523637. The next prime is 512523691. The reversal of 512523640 is 46325215.

It is a junction number, because it is equal to n+sod(n) for n = 512523599 and 512523608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6406506 + ... + 6406585.

Almost surely, 2^512523640 is an apocalyptic number.

It is an amenable number.

512523640 is an abundant number, since it is smaller than the sum of its proper divisors (640654640).

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

512523640 is a wasteful number, since it uses less digits than its factorization.

512523640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12813102 (or 12813098 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 512523640 is about 22638.9849595780. The cubic root of 512523640 is about 800.2726362430.

Adding to 512523640 its reverse (46325215), we get a palindrome (558848855).

The spelling of 512523640 in words is "five hundred twelve million, five hundred twenty-three thousand, six hundred forty".