216255256 has 64 divisors (see below), whose sum is σ = 489646080. Its totient is φ = 87575040.

The previous prime is 216255251. The next prime is 216255257. The reversal of 216255256 is 652552612.

216255256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216255251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73200 + ... + 76096.

It is an arithmetic number, because the mean of its divisors is an integer number (7650720).

Almost surely, 2^216255256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216255256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244823040).

216255256 is an abundant number, since it is smaller than the sum of its proper divisors (273390824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216255256 is a wasteful number, since it uses less digits than its factorization.

216255256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 2980 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 216255256 is about 14705.6198781282. The cubic root of 216255256 is about 600.2362551085.

The spelling of 216255256 in words is "two hundred sixteen million, two hundred fifty-five thousand, two hundred fifty-six".