31828243 has 2 divisors, whose sum is σ = 31828244. Its totient is φ = 31828242.

The previous prime is 31828229. The next prime is 31828261. The reversal of 31828243 is 34282813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31828243 - 2¹³ = 31820051 is a prime.

It is not a weakly prime, because it can be changed into another prime (31828943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15914121 + 15914122.

It is an arithmetic number, because the mean of its divisors is an integer number (15914122).

Almost surely, 2^31828243 is an apocalyptic number.

31828243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31828243 is an equidigital number, since it uses as much as digits as its factorization.

31828243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 31828243 is about 5641.6525061368. The cubic root of 31828243 is about 316.9111760080.

It can be divided in two parts, 318 and 28243, that added together give a 4-th power (28561 = 13⁴).

The spelling of 31828243 in words is "thirty-one million, eight hundred twenty-eight thousand, two hundred forty-three".