512213540 has 24 divisors (see below), whose sum is σ = 1079749440. Its totient is φ = 204104288.

The previous prime is 512213509. The next prime is 512213551. The reversal of 512213540 is 45312215.

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 in 7 ways as a sum of consecutive naturals, for example, 43430 + ... + 53949.

It is an arithmetic number, because the mean of its divisors is an integer number (44989560).

Almost surely, 2^512213540 is an apocalyptic number.

It is an amenable number.

512213540 is an abundant number, since it is smaller than the sum of its proper divisors (567535900).

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

512213540 is a wasteful number, since it uses less digits than its factorization.

512213540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97651 (or 97649 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 512213540 is about 22632.1351180131. The cubic root of 512213540 is about 800.1112032916. Note that the first 3 decimals are identical.

Adding to 512213540 its reverse (45312215), we get a palindrome (557525755).

The spelling of 512213540 in words is "five hundred twelve million, two hundred thirteen thousand, five hundred forty".