2210209 has 2 divisors, whose sum is σ = 2210210. Its totient is φ = 2210208.

The previous prime is 2210189. The next prime is 2210227. The reversal of 2210209 is 9020122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1904400 + 305809 = 1380^2 + 553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2210209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2210192 and 2210201.

It is not a weakly prime, because it can be changed into another prime (2210249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105104 + 1105105.

It is an arithmetic number, because the mean of its divisors is an integer number (1105105).

2^2210209 is an apocalyptic number.

It is an amenable number.

2210209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210209 is an equidigital number, since it uses as much as digits as its factorization.

2210209 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 2210209 is about 1486.6771673770. The cubic root of 2210209 is about 130.2600121491.

The spelling of 2210209 in words is "two million, two hundred ten thousand, two hundred nine".