211398 has 16 divisors (see below), whose sum is σ = 461376. Its totient is φ = 64040.

The previous prime is 211373. The next prime is 211403. The reversal of 211398 is 893112.

It is a super-2 number, since 2×211398² = 89378228808, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211398.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536 + ... + 1667.

It is an arithmetic number, because the mean of its divisors is an integer number (28836).

2²¹¹³⁹⁸ is an apocalyptic number.

211398 is an abundant number, since it is smaller than the sum of its proper divisors (249978).

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

211398 is a wasteful number, since it uses less digits than its factorization.

211398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219.

The product of its digits is 432, while the sum is 24.

The square root of 211398 is about 459.7803823566. The cubic root of 211398 is about 59.5708263749.

It can be divided in two parts, 2113 and 98, that added together give a triangular number (2211 = T₆₆).

The spelling of 211398 in words is "two hundred eleven thousand, three hundred ninety-eight".