31282133 has 2 divisors, whose sum is σ = 31282134. Its totient is φ = 31282132.

The previous prime is 31282127. The next prime is 31282157. The reversal of 31282133 is 33128213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31281649 + 484 = 5593^2 + 22^2 .

It is a cyclic number.

It is not a de Polignac number, because 31282133 - 2⁴ = 31282117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31282099 and 31282108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31282123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15641066 + 15641067.

It is an arithmetic number, because the mean of its divisors is an integer number (15641067).

Almost surely, 2^31282133 is an apocalyptic number.

It is an amenable number.

31282133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31282133 is an equidigital number, since it uses as much as digits as its factorization.

31282133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 31282133 is about 5593.0432682038. The cubic root of 31282133 is about 315.0881856062.

The spelling of 31282133 in words is "thirty-one million, two hundred eighty-two thousand, one hundred thirty-three".