256216 has 8 divisors (see below), whose sum is σ = 480420. Its totient is φ = 128104.

The previous prime is 256211. The next prime is 256219. The reversal of 256216 is 612652.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16006 + ... + 16021.

2²⁵⁶²¹⁶ is an apocalyptic number.

It is an amenable number.

256216 is a deficient number, since it is larger than the sum of its proper divisors (224204).

256216 is a wasteful number, since it uses less digits than its factorization.

256216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32033 (or 32029 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 256216 is about 506.1778343626. The cubic root of 256216 is about 63.5138953203.

Adding to 256216 its reverse (612652), we get a palindrome (868868).

It can be divided in two parts, 25 and 6216, that added together give a square (6241 = 79²).

The spelling of 256216 in words is "two hundred fifty-six thousand, two hundred sixteen".