531085711 has 6 divisors (see below), whose sum is σ = 575081160. Its totient is φ = 490232808.

The previous prime is 531085693. The next prime is 531085721. The reversal of 531085711 is 117580135.

It is a de Polignac number, because none of the positive numbers 2^k-531085711 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 (531085721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1571091 + ... + 1571428.

It is an arithmetic number, because the mean of its divisors is an integer number (95846860).

Almost surely, 2^531085711 is an apocalyptic number.

531085711 is a deficient number, since it is larger than the sum of its proper divisors (43995449).

531085711 is a wasteful number, since it uses less digits than its factorization.

531085711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142545 (or 3142532 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 531085711 is about 23045.2969388550. The cubic root of 531085711 is about 809.8194542477.

It can be divided in two parts, 53 and 1085711, that added together give a square (1085764 = 1042²).

The spelling of 531085711 in words is "five hundred thirty-one million, eighty-five thousand, seven hundred eleven".