531117517 has 6 divisors (see below), whose sum is σ = 617830638. Its totient is φ = 455243544.

The previous prime is 531117473. The next prime is 531117529. The reversal of 531117517 is 715711135.

It can be written as a sum of positive squares in only one way, i.e., 489913956 + 41203561 = 22134^2 + 6419^2 .

It is a de Polignac number, because none of the positive numbers 2^k-531117517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531117547) 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 5 ways as a sum of consecutive naturals, for example, 5419518 + ... + 5419615.

It is an arithmetic number, because the mean of its divisors is an integer number (102971773).

Almost surely, 2^531117517 is an apocalyptic number.

It is an amenable number.

531117517 is a deficient number, since it is larger than the sum of its proper divisors (86713121).

531117517 is a wasteful number, since it uses less digits than its factorization.

531117517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10839147 (or 10839140 counting only the distinct ones).

The product of its digits is 3675, while the sum is 31.

The square root of 531117517 is about 23045.9870042487. The cubic root of 531117517 is about 809.8356202531.

The spelling of 531117517 in words is "five hundred thirty-one million, one hundred seventeen thousand, five hundred seventeen".