31135073 has 2 divisors, whose sum is σ = 31135074. Its totient is φ = 31135072.

The previous prime is 31135061. The next prime is 31135079. The reversal of 31135073 is 37053113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29084449 + 2050624 = 5393^2 + 1432^2 .

It is an emirp because it is prime and its reverse (37053113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31135073 - 2⁴ = 31135057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31135079) 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, 15567536 + 15567537.

It is an arithmetic number, because the mean of its divisors is an integer number (15567537).

Almost surely, 2^31135073 is an apocalyptic number.

It is an amenable number.

31135073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31135073 is an equidigital number, since it uses as much as digits as its factorization.

31135073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945, while the sum is 23.

The square root of 31135073 is about 5579.8810919230. The cubic root of 31135073 is about 314.5936576274.

Adding to 31135073 its reverse (37053113), we get a palindrome (68188186).

The spelling of 31135073 in words is "thirty-one million, one hundred thirty-five thousand, seventy-three".