31665041 has 2 divisors, whose sum is σ = 31665042. Its totient is φ = 31665040.

The previous prime is 31665031. The next prime is 31665059. The reversal of 31665041 is 14056613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 13140625 = 4304^2 + 3625^2 .

It is an emirp because it is prime and its reverse (14056613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31665041 - 2⁶ = 31664977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31665041.

It is not a weakly prime, because it can be changed into another prime (31665031) 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, 15832520 + 15832521.

It is an arithmetic number, because the mean of its divisors is an integer number (15832521).

Almost surely, 2^31665041 is an apocalyptic number.

It is an amenable number.

31665041 is a deficient number, since it is larger than the sum of its proper divisors (1).

31665041 is an equidigital number, since it uses as much as digits as its factorization.

31665041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31665041 is about 5627.1698925837. The cubic root of 31665041 is about 316.3685846277.

The spelling of 31665041 in words is "thirty-one million, six hundred sixty-five thousand, forty-one".