531712913 has 4 divisors (see below), whose sum is σ = 532046628. Its totient is φ = 531379200.

The previous prime is 531712901. The next prime is 531712933. The reversal of 531712913 is 319217135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253223569 + 278489344 = 15913^2 + 16688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531712913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 531712913.

It is not an unprimeable number, because it can be changed into a prime (531712933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164456 + ... + 167657.

It is an arithmetic number, because the mean of its divisors is an integer number (133011657).

Almost surely, 2^531712913 is an apocalyptic number.

It is an amenable number.

531712913 is a deficient number, since it is larger than the sum of its proper divisors (333715).

531712913 is a wasteful number, since it uses less digits than its factorization.

531712913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333714.

The product of its digits is 5670, while the sum is 32.

The square root of 531712913 is about 23058.9009495249. The cubic root of 531712913 is about 810.1381225617.

The spelling of 531712913 in words is "five hundred thirty-one million, seven hundred twelve thousand, nine hundred thirteen".