31716693431 has 4 divisors (see below), whose sum is σ = 31876074000. Its totient is φ = 31557312864.

The previous prime is 31716693419. The next prime is 31716693473. The reversal of 31716693431 is 13439661713.

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

It is a cyclic number.

It is not a de Polignac number, because 31716693431 - 2¹⁰ = 31716692407 is a prime.

It is a super-2 number, since 2×31716693431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31716693731) 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, 79689986 + ... + 79690383.

It is an arithmetic number, because the mean of its divisors is an integer number (7969018500).

Almost surely, 2^31716693431 is an apocalyptic number.

31716693431 is a deficient number, since it is larger than the sum of its proper divisors (159380569).

31716693431 is a wasteful number, since it uses less digits than its factorization.

31716693431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159380568.

The product of its digits is 244944, while the sum is 44.

The spelling of 31716693431 in words is "thirty-one billion, seven hundred sixteen million, six hundred ninety-three thousand, four hundred thirty-one".