31975481 has 2 divisors, whose sum is σ = 31975482. Its totient is φ = 31975480.

The previous prime is 31975457. The next prime is 31975507. The reversal of 31975481 is 18457913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28944400 + 3031081 = 5380^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 31975481 - 2¹⁰ = 31974457 is a prime.

It is a super-2 number, since 2×31975481² = 2044862770362722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31975381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15987740 + 15987741.

It is an arithmetic number, because the mean of its divisors is an integer number (15987741).

Almost surely, 2^31975481 is an apocalyptic number.

It is an amenable number.

31975481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31975481 is an equidigital number, since it uses as much as digits as its factorization.

31975481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 31975481 is about 5654.6866403011. The cubic root of 31975481 is about 317.3991032449.

The spelling of 31975481 in words is "thirty-one million, nine hundred seventy-five thousand, four hundred eighty-one".