31124243 has 2 divisors, whose sum is σ = 31124244. Its totient is φ = 31124242.

The previous prime is 31124237. The next prime is 31124273. The reversal of 31124243 is 34242113.

It is a weak prime.

It is an emirp because it is prime and its reverse (34242113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31124243 - 2¹⁴ = 31107859 is a prime.

It is not a weakly prime, because it can be changed into another prime (31124273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562121 + 15562122.

It is an arithmetic number, because the mean of its divisors is an integer number (15562122).

Almost surely, 2^31124243 is an apocalyptic number.

31124243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124243 is an equidigital number, since it uses as much as digits as its factorization.

31124243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 31124243 is about 5578.9105567306. The cubic root of 31124243 is about 314.5571773915.

Adding to 31124243 its reverse (34242113), we get a palindrome (65366356).

The spelling of 31124243 in words is "thirty-one million, one hundred twenty-four thousand, two hundred forty-three".