520631512 has 8 divisors (see below), whose sum is σ = 976184100. Its totient is φ = 260315752.

The previous prime is 520631497. The next prime is 520631543. The reversal of 520631512 is 215136025.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×520631512² = 542114342574812288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32539462 + ... + 32539477.

Almost surely, 2^520631512 is an apocalyptic number.

It is an amenable number.

520631512 is a deficient number, since it is larger than the sum of its proper divisors (455552588).

520631512 is a wasteful number, since it uses less digits than its factorization.

520631512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65078945 (or 65078941 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 520631512 is about 22817.3511170775. The cubic root of 520631512 is about 804.4705503558.

Adding to 520631512 its reverse (215136025), we get a palindrome (735767537).

The spelling of 520631512 in words is "five hundred twenty million, six hundred thirty-one thousand, five hundred twelve".