201982 has 8 divisors (see below), whose sum is σ = 330552. Its totient is φ = 91800.

The previous prime is 201979. The next prime is 201997. The reversal of 201982 is 289102.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 9181 = 201982 / (2 + 0 + 1 + 9 + 8 + 2).

It is a congruent number.

It is an unprimeable 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, 4569 + ... + 4612.

It is an arithmetic number, because the mean of its divisors is an integer number (41319).

2²⁰¹⁹⁸² is an apocalyptic number.

201982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201982 is a deficient number, since it is larger than the sum of its proper divisors (128570).

201982 is a wasteful number, since it uses less digits than its factorization.

201982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9194.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 201982 is about 449.4240759016. The cubic root of 201982 is about 58.6729002215.

It can be divided in two parts, 20 and 1982, that added together give a palindrome (2002).

The spelling of 201982 in words is "two hundred one thousand, nine hundred eighty-two".