221894 has 4 divisors (see below), whose sum is σ = 332844. Its totient is φ = 110946.

The previous prime is 221891. The next prime is 221909. The reversal of 221894 is 498122.

221894 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221894.

It is not an unprimeable number, because it can be changed into a prime (221891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55472 + ... + 55475.

It is an arithmetic number, because the mean of its divisors is an integer number (83211).

2²²¹⁸⁹⁴ is an apocalyptic number.

221894 is a deficient number, since it is larger than the sum of its proper divisors (110950).

221894 is a wasteful number, since it uses less digits than its factorization.

221894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110949.

The product of its digits is 1152, while the sum is 26.

The square root of 221894 is about 471.0562599096. The cubic root of 221894 is about 60.5408507659.

The spelling of 221894 in words is "two hundred twenty-one thousand, eight hundred ninety-four".