521320466 has 8 divisors (see below), whose sum is σ = 784078284. Its totient is φ = 259961040.

The previous prime is 521320421. The next prime is 521320477. The reversal of 521320466 is 664023125.

It can be written as a sum of positive squares in 2 ways, for example, as 502701241 + 18619225 = 22421^2 + 4315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 348665 + ... + 350156.

Almost surely, 2^521320466 is an apocalyptic number.

521320466 is a deficient number, since it is larger than the sum of its proper divisors (262757818).

521320466 is a wasteful number, since it uses less digits than its factorization.

521320466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699196.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 521320466 is about 22832.4432770564. The cubic root of 521320466 is about 804.8252470994.

The spelling of 521320466 in words is "five hundred twenty-one million, three hundred twenty thousand, four hundred sixty-six".