507221938 has 16 divisors (see below), whose sum is σ = 798693120. Its totient is φ = 241268400.

The previous prime is 507221927. The next prime is 507221951. The reversal of 507221938 is 839122705.

It is a junction number, because it is equal to n+sod(n) for n = 507221897 and 507221906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65673 + ... + 72988.

It is an arithmetic number, because the mean of its divisors is an integer number (49918320).

Almost surely, 2^507221938 is an apocalyptic number.

507221938 is a deficient number, since it is larger than the sum of its proper divisors (291471182).

507221938 is a wasteful number, since it uses less digits than its factorization.

507221938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138753.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 507221938 is about 22521.5882654843. The cubic root of 507221938 is about 797.5036444051.

The spelling of 507221938 in words is "five hundred seven million, two hundred twenty-one thousand, nine hundred thirty-eight".