209056 has 24 divisors (see below), whose sum is σ = 423360. Its totient is φ = 101568.

The previous prime is 209039. The next prime is 209063. The reversal of 209056 is 650902.

It is a super-2 number, since 2×209056² = 87408822272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2²⁰⁹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211680).

209056 is an abundant number, since it is smaller than the sum of its proper divisors (214304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209056 is a wasteful number, since it uses less digits than its factorization.

209056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 209056 is about 457.2264209339. The cubic root of 209056 is about 59.3500212567.

Adding to 209056 its reverse (650902), we get a palindrome (859958).

The spelling of 209056 in words is "two hundred nine thousand, fifty-six".