31313141 has 2 divisors, whose sum is σ = 31313142. Its totient is φ = 31313140.

The previous prime is 31313123. The next prime is 31313147. The reversal of 31313141 is 14131313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30758116 + 555025 = 5546^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313141 - 2⁶ = 31313077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313147) 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, 15656570 + 15656571.

It is an arithmetic number, because the mean of its divisors is an integer number (15656571).

Almost surely, 2^31313141 is an apocalyptic number.

It is an amenable number.

31313141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313141 is an equidigital number, since it uses as much as digits as its factorization.

31313141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 31313141 is about 5595.8145966427. The cubic root of 31313141 is about 315.1922602231.

Adding to 31313141 its reverse (14131313), we get a palindrome (45444454).

The spelling of 31313141 in words is "thirty-one million, three hundred thirteen thousand, one hundred forty-one".