213287 has 2 divisors, whose sum is σ = 213288. Its totient is φ = 213286.

The previous prime is 213281. The next prime is 213289. The reversal of 213287 is 782312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213287 - 2⁶ = 213223 is a prime.

Together with 213289, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106643 + 106644.

It is an arithmetic number, because the mean of its divisors is an integer number (106644).

2²¹³²⁸⁷ is an apocalyptic number.

213287 is a deficient number, since it is larger than the sum of its proper divisors (1).

213287 is an equidigital number, since it uses as much as digits as its factorization.

213287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 213287 is about 461.8300553234. The cubic root of 213287 is about 59.7477371738.

Adding to 213287 its reverse (782312), we get a palindrome (995599).

The spelling of 213287 in words is "two hundred thirteen thousand, two hundred eighty-seven".