971316531 has 24 divisors (see below), whose sum is σ = 1432332720. Its totient is φ = 634061376.

The previous prime is 971316509. The next prime is 971316559. The reversal of 971316531 is 135613179.

971316531 is a `hidden beast` number, since 97 + 1 + 31 + 6 + 531 = 666.

It is not a de Polignac number, because 971316531 - 2⁹ = 971316019 is a prime.

It is a super-2 number, since 2×971316531² = 1886911606787747922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (971316431) 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 23 ways as a sum of consecutive naturals, for example, 278265 + ... + 281733.

It is an arithmetic number, because the mean of its divisors is an integer number (59680530).

Almost surely, 2^971316531 is an apocalyptic number.

971316531 is a deficient number, since it is larger than the sum of its proper divisors (461016189).

971316531 is a wasteful number, since it uses less digits than its factorization.

971316531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115 (or 4112 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 971316531 is about 31165.9514695124. The cubic root of 971316531 is about 990.3459427676.

It can be divided in two parts, 9713 and 16531, that added together give a square (26244 = 162²).

The spelling of 971316531 in words is "nine hundred seventy-one million, three hundred sixteen thousand, five hundred thirty-one".