31661083 has 2 divisors, whose sum is σ = 31661084. Its totient is φ = 31661082.

The previous prime is 31661081. The next prime is 31661093. The reversal of 31661083 is 38016613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31661083 - 2¹ = 31661081 is a prime.

Together with 31661081, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31661081) 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, 15830541 + 15830542.

It is an arithmetic number, because the mean of its divisors is an integer number (15830542).

Almost surely, 2^31661083 is an apocalyptic number.

31661083 is a deficient number, since it is larger than the sum of its proper divisors (1).

31661083 is an equidigital number, since it uses as much as digits as its factorization.

31661083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 31661083 is about 5626.8181950370. The cubic root of 31661083 is about 316.3554024874.

Adding to 31661083 its reverse (38016613), we get a palindrome (69677696).

The spelling of 31661083 in words is "thirty-one million, six hundred sixty-one thousand, eighty-three".