31875497 has 2 divisors, whose sum is σ = 31875498. Its totient is φ = 31875496.

The previous prime is 31875479. The next prime is 31875509. The reversal of 31875497 is 79457813.

Together with previous prime (31875479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 12418576 = 4411^2 + 3524^2 .

It is a cyclic number.

It is not a de Polignac number, because 31875497 - 2⁶ = 31875433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31875097) 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 as a sum of consecutive naturals, namely, 15937748 + 15937749.

It is an arithmetic number, because the mean of its divisors is an integer number (15937749).

Almost surely, 2^31875497 is an apocalyptic number.

It is an amenable number.

31875497 is a deficient number, since it is larger than the sum of its proper divisors (1).

31875497 is an equidigital number, since it uses as much as digits as its factorization.

31875497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 31875497 is about 5645.8389102063. The cubic root of 31875497 is about 317.0679331764.

The spelling of 31875497 in words is "thirty-one million, eight hundred seventy-five thousand, four hundred ninety-seven".