31184201 has 2 divisors, whose sum is σ = 31184202. Its totient is φ = 31184200.

The previous prime is 31184191. The next prime is 31184203. The reversal of 31184201 is 10248113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28344976 + 2839225 = 5324^2 + 1685^2 .

It is an emirp because it is prime and its reverse (10248113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31184201 - 2¹⁸ = 30922057 is a prime.

Together with 31184203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31184203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15592100 + 15592101.

It is an arithmetic number, because the mean of its divisors is an integer number (15592101).

Almost surely, 2^31184201 is an apocalyptic number.

It is an amenable number.

31184201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31184201 is an equidigital number, since it uses as much as digits as its factorization.

31184201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 31184201 is about 5584.2816010656. The cubic root of 31184201 is about 314.7590363450.

The spelling of 31184201 in words is "thirty-one million, one hundred eighty-four thousand, two hundred one".