31648871 has 2 divisors, whose sum is σ = 31648872. Its totient is φ = 31648870.

The previous prime is 31648867. The next prime is 31648879. The reversal of 31648871 is 17884613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31648871 - 2² = 31648867 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31648879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15824435 + 15824436.

It is an arithmetic number, because the mean of its divisors is an integer number (15824436).

Almost surely, 2^31648871 is an apocalyptic number.

31648871 is a deficient number, since it is larger than the sum of its proper divisors (1).

31648871 is an equidigital number, since it uses as much as digits as its factorization.

31648871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 31648871 is about 5625.7329300279. The cubic root of 31648871 is about 316.3147234305.

The spelling of 31648871 in words is "thirty-one million, six hundred forty-eight thousand, eight hundred seventy-one".