525316321 has 8 divisors (see below), whose sum is σ = 541246464. Its totient is φ = 509584320.

The previous prime is 525316261. The next prime is 525316333. The reversal of 525316321 is 123613525.

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 525316321 - 2⁹ = 525315809 is a prime.

It is a super-3 number, since 3×525316321³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525316321.

It is not an unprimeable number, because it can be changed into a prime (525316391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44145 + ... + 54766.

It is an arithmetic number, because the mean of its divisors is an integer number (67655808).

Almost surely, 2^525316321 is an apocalyptic number.

It is an amenable number.

525316321 is a deficient number, since it is larger than the sum of its proper divisors (15930143).

525316321 is a wasteful number, since it uses less digits than its factorization.

525316321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99071.

The product of its digits is 5400, while the sum is 28.

The square root of 525316321 is about 22919.7801254724. The cubic root of 525316321 is about 806.8763099636.

Adding to 525316321 its reverse (123613525), we get a palindrome (648929846).

The spelling of 525316321 in words is "five hundred twenty-five million, three hundred sixteen thousand, three hundred twenty-one".