255440140 has 24 divisors (see below), whose sum is σ = 543775680. Its totient is φ = 100775808.

The previous prime is 255440131. The next prime is 255440173. The reversal of 255440140 is 41044552.

It is a happy number.

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, 86020 + ... + 88939.

It is an arithmetic number, because the mean of its divisors is an integer number (22657320).

Almost surely, 2^255440140 is an apocalyptic number.

255440140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255440140 is an abundant number, since it is smaller than the sum of its proper divisors (288335540).

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

255440140 is a wasteful number, since it uses less digits than its factorization.

255440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175041 (or 175039 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 255440140 is about 15982.4947989981. The cubic root of 255440140 is about 634.4972067217.

Adding to 255440140 its reverse (41044552), we get a palindrome (296484692).

The spelling of 255440140 in words is "two hundred fifty-five million, four hundred forty thousand, one hundred forty".