31664011 has 2 divisors, whose sum is σ = 31664012. Its totient is φ = 31664010.

The previous prime is 31663997. The next prime is 31664023. The reversal of 31664011 is 11046613.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11046613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31664011 - 2¹⁷ = 31532939 is a prime.

It is not a weakly prime, because it can be changed into another prime (31664071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15832005 + 15832006.

It is an arithmetic number, because the mean of its divisors is an integer number (15832006).

Almost surely, 2^31664011 is an apocalyptic number.

31664011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31664011 is an equidigital number, since it uses as much as digits as its factorization.

31664011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31664011 is about 5627.0783715886. The cubic root of 31664011 is about 316.3651543129.

The spelling of 31664011 in words is "thirty-one million, six hundred sixty-four thousand, eleven".