31663241 has 2 divisors, whose sum is σ = 31663242. Its totient is φ = 31663240.

The previous prime is 31663237. The next prime is 31663267. The reversal of 31663241 is 14236613.

It is an a-pointer prime, because the next prime (31663267) can be obtained adding 31663241 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31595641 + 67600 = 5621^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 31663241 - 2² = 31663237 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31663241.

It is not a weakly prime, because it can be changed into another prime (31663201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831620 + 15831621.

It is an arithmetic number, because the mean of its divisors is an integer number (15831621).

Almost surely, 2^31663241 is an apocalyptic number.

It is an amenable number.

31663241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663241 is an equidigital number, since it uses as much as digits as its factorization.

31663241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 31663241 is about 5627.0099520083. The cubic root of 31663241 is about 316.3625898542.

Adding to 31663241 its reverse (14236613), we get a palindrome (45899854).

The spelling of 31663241 in words is "thirty-one million, six hundred sixty-three thousand, two hundred forty-one".