513644532 has 12 divisors (see below), whose sum is σ = 1198503936. Its totient is φ = 171214840.

The previous prime is 513644531. The next prime is 513644557. The reversal of 513644532 is 235446315.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 513644493 and 513644502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513644531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21401844 + ... + 21401867.

It is an arithmetic number, because the mean of its divisors is an integer number (99875328).

Almost surely, 2^513644532 is an apocalyptic number.

It is an amenable number.

513644532 is an abundant number, since it is smaller than the sum of its proper divisors (684859404).

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

513644532 is a wasteful number, since it uses less digits than its factorization.

513644532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42803718 (or 42803716 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 513644532 is about 22663.7272309742. The cubic root of 513644532 is about 800.8556116679.

The spelling of 513644532 in words is "five hundred thirteen million, six hundred forty-four thousand, five hundred thirty-two".