255243140 has 24 divisors (see below), whose sum is σ = 537085080. Its totient is φ = 101892608.

The previous prime is 255243139. The next prime is 255243143. The reversal of 255243140 is 41342552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46267204 + 208975936 = 6802^2 + 14456^2 .

It is not an unprimeable number, because it can be changed into a prime (255243143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357 + ... + 22716.

It is an arithmetic number, because the mean of its divisors is an integer number (22378545).

Almost surely, 2^255243140 is an apocalyptic number.

255243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255243140 is an abundant number, since it is smaller than the sum of its proper divisors (281841940).

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

255243140 is a wasteful number, since it uses less digits than its factorization.

255243140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25591 (or 25589 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 255243140 is about 15976.3306175104. The cubic root of 255243140 is about 634.3340529112.

Adding to 255243140 its reverse (41342552), we get a palindrome (296585692).

The spelling of 255243140 in words is "two hundred fifty-five million, two hundred forty-three thousand, one hundred forty".