2031210217 has 2 divisors, whose sum is σ = 2031210218. Its totient is φ = 2031210216.

The previous prime is 2031210193. The next prime is 2031210271. The reversal of 2031210217 is 7120121302.

Together with next prime (2031210271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1722997081 + 308213136 = 41509^2 + 17556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031210217 - 2¹⁹ = 2030685929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2031210194 and 2031210203.

It is not a weakly prime, because it can be changed into another prime (2031210277) 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, 1015605108 + 1015605109.

It is an arithmetic number, because the mean of its divisors is an integer number (1015605109).

Almost surely, 2^2031210217 is an apocalyptic number.

It is an amenable number.

2031210217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031210217 is an equidigital number, since it uses as much as digits as its factorization.

2031210217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2031210217 is about 45068.9495883807. The cubic root of 2031210217 is about 1266.4409867170.

Adding to 2031210217 its reverse (7120121302), we get a palindrome (9151331519).

The spelling of 2031210217 in words is "two billion, thirty-one million, two hundred ten thousand, two hundred seventeen".