531313505 has 8 divisors (see below), whose sum is σ = 637711272. Its totient is φ = 424960768.

The previous prime is 531313493. The next prime is 531313513. The reversal of 531313505 is 505313135.

It can be written as a sum of positive squares in 4 ways, for example, as 69622336 + 461691169 = 8344^2 + 21487^2 .

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 531313505 - 2⁶ = 531313441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 25799 + ... + 41571.

It is an arithmetic number, because the mean of its divisors is an integer number (79713909).

Almost surely, 2^531313505 is an apocalyptic number.

It is an amenable number.

531313505 is a deficient number, since it is larger than the sum of its proper divisors (106397767).

531313505 is a wasteful number, since it uses less digits than its factorization.

531313505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22515.

The product of its (nonzero) digits is 3375, while the sum is 26.

The square root of 531313505 is about 23050.2387189374. The cubic root of 531313505 is about 809.9352206488.

The spelling of 531313505 in words is "five hundred thirty-one million, three hundred thirteen thousand, five hundred five".