518934321 has 6 divisors (see below), whose sum is σ = 749571810. Its totient is φ = 345956208.

The previous prime is 518934209. The next prime is 518934371. The reversal of 518934321 is 123439815.

It can be written as a sum of positive squares in only one way, i.e., 417630096 + 101304225 = 20436^2 + 10065^2 .

It is not a de Polignac number, because 518934321 - 2⁷ = 518934193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (518934371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28829676 + ... + 28829693.

It is an arithmetic number, because the mean of its divisors is an integer number (124928635).

Almost surely, 2^518934321 is an apocalyptic number.

It is an amenable number.

518934321 is a deficient number, since it is larger than the sum of its proper divisors (230637489).

518934321 is a wasteful number, since it uses less digits than its factorization.

518934321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57659375 (or 57659372 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 518934321 is about 22780.1299601209. The cubic root of 518934321 is about 803.5954423063.

The spelling of 518934321 in words is "five hundred eighteen million, nine hundred thirty-four thousand, three hundred twenty-one".