31663343 has 2 divisors, whose sum is σ = 31663344. Its totient is φ = 31663342.

The previous prime is 31663327. The next prime is 31663397. The reversal of 31663343 is 34336613.

It is a weak prime.

It is an emirp because it is prime and its reverse (34336613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31663343 - 2⁴ = 31663327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31666343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831671 + 15831672.

It is an arithmetic number, because the mean of its divisors is an integer number (15831672).

Almost surely, 2^31663343 is an apocalyptic number.

31663343 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663343 is an equidigital number, since it uses as much as digits as its factorization.

31663343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 29.

The square root of 31663343 is about 5627.0190154290. The cubic root of 31663343 is about 316.3629295641.

Adding to 31663343 its reverse (34336613), we get a palindrome (65999956).

The spelling of 31663343 in words is "thirty-one million, six hundred sixty-three thousand, three hundred forty-three".