211257 has 6 divisors (see below), whose sum is σ = 305162. Its totient is φ = 140832.

The previous prime is 211247. The next prime is 211271. The reversal of 211257 is 752112.

It can be written as a sum of positive squares in only one way, i.e., 210681 + 576 = 459^2 + 24^2 .

It is not a de Polignac number, because 211257 - 2⁴ = 211241 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211257.

It is not an unprimeable number, because it can be changed into a prime (211217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11728 + ... + 11745.

2²¹¹²⁵⁷ is an apocalyptic number.

It is an amenable number.

211257 is a deficient number, since it is larger than the sum of its proper divisors (93905).

211257 is a wasteful number, since it uses less digits than its factorization.

211257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23479 (or 23476 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 211257 is about 459.6270227043. The cubic root of 211257 is about 59.5575790805.

Adding to 211257 its reverse (752112), we get a palindrome (963369).

The spelling of 211257 in words is "two hundred eleven thousand, two hundred fifty-seven".