31111141 has 2 divisors, whose sum is σ = 31111142. Its totient is φ = 31111140.

The previous prime is 31111127. The next prime is 31111147. The reversal of 31111141 is 14111113.

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., 17048641 + 14062500 = 4129^2 + 3750^2 .

It is an emirp because it is prime and its reverse (14111113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31111141 - 2⁷ = 31111013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555570 + 15555571.

It is an arithmetic number, because the mean of its divisors is an integer number (15555571).

Almost surely, 2^31111141 is an apocalyptic number.

It is an amenable number.

31111141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111141 is an equidigital number, since it uses as much as digits as its factorization.

31111141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 13.

The square root of 31111141 is about 5577.7361895307. The cubic root of 31111141 is about 314.5130327401.

Adding to 31111141 its reverse (14111113), we get a palindrome (45222254).

The spelling of 31111141 in words is "thirty-one million, one hundred eleven thousand, one hundred forty-one".