31341161 has 2 divisors, whose sum is σ = 31341162. Its totient is φ = 31341160.

The previous prime is 31341137. The next prime is 31341173. The reversal of 31341161 is 16114313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31147561 + 193600 = 5581^2 + 440^2 .

It is an emirp because it is prime and its reverse (16114313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31341161 - 2²² = 27146857 is a prime.

It is not a weakly prime, because it can be changed into another prime (31341361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670580 + 15670581.

It is an arithmetic number, because the mean of its divisors is an integer number (15670581).

Almost surely, 2^31341161 is an apocalyptic number.

It is an amenable number.

31341161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31341161 is an equidigital number, since it uses as much as digits as its factorization.

31341161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 31341161 is about 5598.3176937362. The cubic root of 31341161 is about 315.2862468995.

Adding to 31341161 its reverse (16114313), we get a palindrome (47455474).

The spelling of 31341161 in words is "thirty-one million, three hundred forty-one thousand, one hundred sixty-one".