531317685057 has 4 divisors (see below), whose sum is σ = 708423580080. Its totient is φ = 354211790036.

The previous prime is 531317685049. The next prime is 531317685079. The reversal of 531317685057 is 750586713135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531317685057 - 2³ = 531317685049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531317685047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88552947507 + ... + 88552947512.

It is an arithmetic number, because the mean of its divisors is an integer number (177105895020).

Almost surely, 2^531317685057 is an apocalyptic number.

It is an amenable number.

531317685057 is a deficient number, since it is larger than the sum of its proper divisors (177105895023).

531317685057 is a wasteful number, since it uses less digits than its factorization.

531317685057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177105895022.

The product of its (nonzero) digits is 2646000, while the sum is 51.

The spelling of 531317685057 in words is "five hundred thirty-one billion, three hundred seventeen million, six hundred eighty-five thousand, fifty-seven".