512221938 has 32 divisors (see below), whose sum is σ = 1062754560. Its totient is φ = 164461440.

The previous prime is 512221907. The next prime is 512221939. The reversal of 512221938 is 839122215.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 512221899 and 512221908.

It is not an unprimeable number, because it can be changed into a prime (512221939) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6256 + ... + 32612.

It is an arithmetic number, because the mean of its divisors is an integer number (33211080).

Almost surely, 2^512221938 is an apocalyptic number.

512221938 is an abundant number, since it is smaller than the sum of its proper divisors (550532622).

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

512221938 is a wasteful number, since it uses less digits than its factorization.

512221938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26482.

The product of its digits is 8640, while the sum is 33.

The square root of 512221938 is about 22632.3206499024. The cubic root of 512221938 is about 800.1155760103.

The spelling of 512221938 in words is "five hundred twelve million, two hundred twenty-one thousand, nine hundred thirty-eight".