31172073271 has 2 divisors, whose sum is σ = 31172073272. Its totient is φ = 31172073270.

The previous prime is 31172073263. The next prime is 31172073337. The reversal of 31172073271 is 17237027113.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17237027113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31172073271 - 2³ = 31172073263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31172073071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15586036635 + 15586036636.

It is an arithmetic number, because the mean of its divisors is an integer number (15586036636).

Almost surely, 2^31172073271 is an apocalyptic number.

31172073271 is a deficient number, since it is larger than the sum of its proper divisors (1).

31172073271 is an equidigital number, since it uses as much as digits as its factorization.

31172073271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 34.

The spelling of 31172073271 in words is "thirty-one billion, one hundred seventy-two million, seventy-three thousand, two hundred seventy-one".