216926 has 4 divisors (see below), whose sum is σ = 325392. Its totient is φ = 108462.

The previous prime is 216919. The next prime is 216947. The reversal of 216926 is 629612.

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

It is a junction number, because it is equal to n+sod(n) for n = 216895 and 216904.

It is a congruent number.

It is an unprimeable number.

216926 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54230 + ... + 54233.

It is an arithmetic number, because the mean of its divisors is an integer number (81348).

2²¹⁶⁹²⁶ is an apocalyptic number.

216926 is a deficient number, since it is larger than the sum of its proper divisors (108466).

216926 is a wasteful number, since it uses less digits than its factorization.

216926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108465.

The product of its digits is 1296, while the sum is 26.

The square root of 216926 is about 465.7531535052. The cubic root of 216926 is about 60.0856185071.

Subtracting 216926 from its reverse (629612), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 216926 in words is "two hundred sixteen thousand, nine hundred twenty-six".