255243040 has 144 divisors (see below), whose sum is σ = 674740584. Its totient is φ = 90685440.

The previous prime is 255243019. The next prime is 255243047. The reversal of 255243040 is 40342552.

255243040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 39388176 + 215854864 = 6276^2 + 14692^2 .

It is a junction number, because it is equal to n+sod(n) for n = 255242996 and 255243014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255243047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3496444 + ... + 3496516.

Almost surely, 2^255243040 is an apocalyptic number.

255243040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255243040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337370292).

255243040 is an abundant number, since it is smaller than the sum of its proper divisors (419497544).

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

255243040 is a wasteful number, since it uses less digits than its factorization.

255243040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 255243040 is about 15976.3274878803. The cubic root of 255243040 is about 634.3339700707. Note that the first 3 decimals are identical.

Adding to 255243040 its reverse (40342552), we get a palindrome (295585592).

The spelling of 255243040 in words is "two hundred fifty-five million, two hundred forty-three thousand, forty".