31654243 has 2 divisors, whose sum is σ = 31654244. Its totient is φ = 31654242.

The previous prime is 31654241. The next prime is 31654297. The reversal of 31654243 is 34245613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31654243 - 2¹ = 31654241 is a prime.

Together with 31654241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31654241) 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, 15827121 + 15827122.

It is an arithmetic number, because the mean of its divisors is an integer number (15827122).

Almost surely, 2^31654243 is an apocalyptic number.

31654243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31654243 is an equidigital number, since it uses as much as digits as its factorization.

31654243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 31654243 is about 5626.2103586695. The cubic root of 31654243 is about 316.3326192407.

Adding to 31654243 its reverse (34245613), we get a palindrome (65899856).

The spelling of 31654243 in words is "thirty-one million, six hundred fifty-four thousand, two hundred forty-three".