213291 has 12 divisors (see below), whose sum is σ = 331968. Its totient is φ = 131184.

The previous prime is 213289. The next prime is 213307. The reversal of 213291 is 192312.

It is a happy number.

It is not a de Polignac number, because 213291 - 2¹ = 213289 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (213281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 795 + ... + 1028.

It is an arithmetic number, because the mean of its divisors is an integer number (27664).

2²¹³²⁹¹ is an apocalyptic number.

213291 is a deficient number, since it is larger than the sum of its proper divisors (118677).

213291 is a wasteful number, since it uses less digits than its factorization.

213291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842 (or 1839 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 213291 is about 461.8343859004. The cubic root of 213291 is about 59.7481106759.

The spelling of 213291 in words is "two hundred thirteen thousand, two hundred ninety-one".