213471 has 6 divisors (see below), whose sum is σ = 308360. Its totient is φ = 142308.

The previous prime is 213467. The next prime is 213481. The reversal of 213471 is 174312.

It is not a de Polignac number, because 213471 - 2² = 213467 is a prime.

It is a super-3 number, since 3×213471³ = 29183535773658333, which contains 333 as substring.

It is a Duffinian 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 213471.

It is not an unprimeable number, because it can be changed into a prime (213461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11851 + ... + 11868.

2²¹³⁴⁷¹ is an apocalyptic number.

213471 is a deficient number, since it is larger than the sum of its proper divisors (94889).

213471 is a wasteful number, since it uses less digits than its factorization.

213471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23725 (or 23722 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 213471 is about 462.0292198552. The cubic root of 213471 is about 59.7649134415.

Adding to 213471 its reverse (174312), we get a palindrome (387783).

The spelling of 213471 in words is "two hundred thirteen thousand, four hundred seventy-one".