221914 has 24 divisors (see below), whose sum is σ = 421344. Its totient is φ = 85800.

The previous prime is 221909. The next prime is 221941. The reversal of 221914 is 419122.

221914 = 137² + 138² + ... + 147².

It is a junction number, because it is equal to n+sod(n) for n = 221891 and 221900.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1629 + ... + 1759.

It is an arithmetic number, because the mean of its divisors is an integer number (17556).

2²²¹⁹¹⁴ is an apocalyptic number.

221914 is a deficient number, since it is larger than the sum of its proper divisors (199430).

221914 is a wasteful number, since it uses less digits than its factorization.

221914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 151 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 221914 is about 471.0774883180. The cubic root of 221914 is about 60.5426696233.

It can be divided in two parts, 22 and 1914, that added together give a square (1936 = 44²).

The spelling of 221914 in words is "two hundred twenty-one thousand, nine hundred fourteen".