31980229 has 2 divisors, whose sum is σ = 31980230. Its totient is φ = 31980228.

The previous prime is 31980217. The next prime is 31980241. The reversal of 31980229 is 92208913.

It is a balanced prime because it is at equal distance from previous prime (31980217) and next prime (31980241).

It can be written as a sum of positive squares in only one way, i.e., 25100100 + 6880129 = 5010^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 31980229 - 2⁷ = 31980101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31980194 and 31980203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31980209) 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, 15990114 + 15990115.

It is an arithmetic number, because the mean of its divisors is an integer number (15990115).

Almost surely, 2^31980229 is an apocalyptic number.

It is an amenable number.

31980229 is a deficient number, since it is larger than the sum of its proper divisors (1).

31980229 is an equidigital number, since it uses as much as digits as its factorization.

31980229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 31980229 is about 5655.1064534631. The cubic root of 31980229 is about 317.4148125353.

The spelling of 31980229 in words is "thirty-one million, nine hundred eighty thousand, two hundred twenty-nine".