2212009 has 2 divisors, whose sum is σ = 2212010. Its totient is φ = 2212008.

The previous prime is 2212003. The next prime is 2212039. The reversal of 2212009 is 9002122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2190400 + 21609 = 1480^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212009 - 2⁵ = 2211977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211983 and 2212001.

It is not a weakly prime, because it can be changed into another prime (2212003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106004 + 1106005.

It is an arithmetic number, because the mean of its divisors is an integer number (1106005).

2^2212009 is an apocalyptic number.

It is an amenable number.

2212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212009 is an equidigital number, since it uses as much as digits as its factorization.

2212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2212009 is about 1487.2824210620. The cubic root of 2212009 is about 130.2953639190.

The spelling of 2212009 in words is "two million, two hundred twelve thousand, nine".