31297671 has 36 divisors (see below), whose sum is σ = 48979112. Its totient is φ = 19957104.

The previous prime is 31297661. The next prime is 31297703. The reversal of 31297671 is 17679213.

It is a happy number.

It is not a de Polignac number, because 31297671 - 2⁵ = 31297639 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 (31297661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 530440 + ... + 530498.

Almost surely, 2^31297671 is an apocalyptic number.

31297671 is a deficient number, since it is larger than the sum of its proper divisors (17681441).

31297671 is an frugal number, since it uses more digits than its factorization.

31297671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 99 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 31297671 is about 5594.4321427648. The cubic root of 31297671 is about 315.1403456242.

The spelling of 31297671 in words is "thirty-one million, two hundred ninety-seven thousand, six hundred seventy-one".