213982 has 8 divisors (see below), whose sum is σ = 324576. Its totient is φ = 105792.

The previous prime is 213977. The next prime is 213989. The reversal of 213982 is 289312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213989) by changing a digit.

213982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 358 + ... + 745.

It is an arithmetic number, because the mean of its divisors is an integer number (40572).

2²¹³⁹⁸² is an apocalyptic number.

213982 is a deficient number, since it is larger than the sum of its proper divisors (110594).

213982 is a wasteful number, since it uses less digits than its factorization.

213982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202.

The product of its digits is 864, while the sum is 25.

The square root of 213982 is about 462.5818846431. The cubic root of 213982 is about 59.8125632154.

The spelling of 213982 in words is "two hundred thirteen thousand, nine hundred eighty-two".