521325505 has 8 divisors (see below), whose sum is σ = 627037992. Its totient is φ = 416095488.

The previous prime is 521325487. The next prime is 521325529. The reversal of 521325505 is 505523125.

It can be written as a sum of positive squares in 4 ways, for example, as 25281 + 521300224 = 159^2 + 22832^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 521325505 - 2⁵ = 521325473 is a prime.

It is a Duffinian number.

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, 118234 + ... + 122563.

It is an arithmetic number, because the mean of its divisors is an integer number (78379749).

Almost surely, 2^521325505 is an apocalyptic number.

It is an amenable number.

521325505 is a deficient number, since it is larger than the sum of its proper divisors (105712487).

521325505 is a wasteful number, since it uses less digits than its factorization.

521325505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241235.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 521325505 is about 22832.5536241569. The cubic root of 521325505 is about 804.8278401949.

The spelling of 521325505 in words is "five hundred twenty-one million, three hundred twenty-five thousand, five hundred five".