31290727671 has 18 divisors (see below), whose sum is σ = 52576937712. Its totient is φ = 17880415560.

The previous prime is 31290727667. The next prime is 31290727681. The reversal of 31290727671 is 17672709213.

It is not a de Polignac number, because 31290727671 - 2² = 31290727667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31290727621) 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 17 ways as a sum of consecutive naturals, for example, 35476575 + ... + 35477456.

It is an arithmetic number, because the mean of its divisors is an integer number (2920940984).

Almost surely, 2^31290727671 is an apocalyptic number.

31290727671 is a deficient number, since it is larger than the sum of its proper divisors (21286210041).

31290727671 is a wasteful number, since it uses less digits than its factorization.

31290727671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70954051 (or 70954041 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The spelling of 31290727671 in words is "thirty-one billion, two hundred ninety million, seven hundred twenty-seven thousand, six hundred seventy-one".