221874 has 8 divisors (see below), whose sum is σ = 443760. Its totient is φ = 73956.

The previous prime is 221873. The next prime is 221891. The reversal of 221874 is 478122.

221874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

221874 is an admirable number.

It is a Curzon number.

It is a nialpdrome in base 6.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221874.

It is not an unprimeable number, because it can be changed into a prime (221873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18484 + ... + 18495.

It is an arithmetic number, because the mean of its divisors is an integer number (55470).

2²²¹⁸⁷⁴ is an apocalyptic number.

221874 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221874 is a wasteful number, since it uses less digits than its factorization.

221874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36984.

The product of its digits is 896, while the sum is 24.

The square root of 221874 is about 471.0350305444. The cubic root of 221874 is about 60.5390317992.

Adding to 221874 its reverse (478122), we get a palindrome (699996).

The spelling of 221874 in words is "two hundred twenty-one thousand, eight hundred seventy-four".