2257209 has 12 divisors (see below), whose sum is σ = 3452436. Its totient is φ = 1416192.

The previous prime is 2257207. The next prime is 2257237. The reversal of 2257209 is 9027522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1447209 + 810000 = 1203^2 + 900^2 .

It is not a de Polignac number, because 2257209 - 2¹ = 2257207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2257207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7224 + ... + 7529.

It is an arithmetic number, because the mean of its divisors is an integer number (287703).

2^2257209 is an apocalyptic number.

It is an amenable number.

2257209 is a deficient number, since it is larger than the sum of its proper divisors (1195227).

2257209 is a wasteful number, since it uses less digits than its factorization.

2257209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14776 (or 14773 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2257209 is about 1502.4010782744. The cubic root of 2257209 is about 131.1768681023.

The spelling of 2257209 in words is "two million, two hundred fifty-seven thousand, two hundred nine".