221734 has 8 divisors (see below), whose sum is σ = 344160. Its totient is φ = 107016.

The previous prime is 221729. The next prime is 221737. The reversal of 221734 is 437122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221737) 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, 1854 + ... + 1969.

It is an arithmetic number, because the mean of its divisors is an integer number (43020).

2²²¹⁷³⁴ is an apocalyptic number.

221734 is a deficient number, since it is larger than the sum of its proper divisors (122426).

221734 is a wasteful number, since it uses less digits than its factorization.

221734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854.

The product of its digits is 336, while the sum is 19.

The square root of 221734 is about 470.8863981896. The cubic root of 221734 is about 60.5262959705.

Adding to 221734 its reverse (437122), we get a palindrome (658856).

It can be divided in two parts, 2 and 21734, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 221734 in words is "two hundred twenty-one thousand, seven hundred thirty-four".