243166256 has 40 divisors (see below), whose sum is σ = 498204720. Its totient is φ = 114656256.

The previous prime is 243166241. The next prime is 243166271. The reversal of 243166256 is 652661342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243166241) and next prime (243166271).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69116 + ... + 72548.

It is an arithmetic number, because the mean of its divisors is an integer number (12455118).

Almost surely, 2^243166256 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 243166256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249102360).

243166256 is an abundant number, since it is smaller than the sum of its proper divisors (255038464).

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

243166256 is a wasteful number, since it uses less digits than its factorization.

243166256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693 (or 3687 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 243166256 is about 15593.7890199913. The cubic root of 243166256 is about 624.1674298690.

The spelling of 243166256 in words is "two hundred forty-three million, one hundred sixty-six thousand, two hundred fifty-six".