521345315 has 8 divisors (see below), whose sum is σ = 631688928. Its totient is φ = 413026560.

The previous prime is 521345311. The next prime is 521345333. The reversal of 521345315 is 513543125.

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

It is not a de Polignac number, because 521345315 - 2² = 521345311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521345311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505646 + ... + 506675.

It is an arithmetic number, because the mean of its divisors is an integer number (78961116).

Almost surely, 2^521345315 is an apocalyptic number.

521345315 is a deficient number, since it is larger than the sum of its proper divisors (110343613).

521345315 is a wasteful number, since it uses less digits than its factorization.

521345315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012429.

The product of its digits is 9000, while the sum is 29.

The square root of 521345315 is about 22832.9874304700. The cubic root of 521345315 is about 804.8380343618.

The spelling of 521345315 in words is "five hundred twenty-one million, three hundred forty-five thousand, three hundred fifteen".