2209855237 has 2 divisors, whose sum is σ = 2209855238. Its totient is φ = 2209855236.

The previous prime is 2209855223. The next prime is 2209855247. The reversal of 2209855237 is 7325589022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1645032481 + 564822756 = 40559^2 + 23766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2209855237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2209855193 and 2209855202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2209855247) 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, 1104927618 + 1104927619.

It is an arithmetic number, because the mean of its divisors is an integer number (1104927619).

Almost surely, 2^2209855237 is an apocalyptic number.

It is an amenable number.

2209855237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209855237 is an equidigital number, since it uses as much as digits as its factorization.

2209855237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 2209855237 is about 47009.0973855061. The cubic root of 2209855237 is about 1302.5306203236.

The spelling of 2209855237 in words is "two billion, two hundred nine million, eight hundred fifty-five thousand, two hundred thirty-seven".