31124143 has 2 divisors, whose sum is σ = 31124144. Its totient is φ = 31124142.

The previous prime is 31124123. The next prime is 31124153. The reversal of 31124143 is 34142113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31124143 - 2¹⁷ = 30993071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31124143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31124123) 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, 15562071 + 15562072.

It is an arithmetic number, because the mean of its divisors is an integer number (15562072).

Almost surely, 2^31124143 is an apocalyptic number.

31124143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124143 is an equidigital number, since it uses as much as digits as its factorization.

31124143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 31124143 is about 5578.9015944001. The cubic root of 31124143 is about 314.5568405078.

Adding to 31124143 its reverse (34142113), we get a palindrome (65266256).

The spelling of 31124143 in words is "thirty-one million, one hundred twenty-four thousand, one hundred forty-three".