255543240 has 32 divisors (see below), whose sum is σ = 766630080. Its totient is φ = 68144832.

The previous prime is 255543227. The next prime is 255543251. The reversal of 255543240 is 42345552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 255543198 and 255543207.

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, 1064644 + ... + 1064883.

It is an arithmetic number, because the mean of its divisors is an integer number (23957190).

Almost surely, 2^255543240 is an apocalyptic number.

255543240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255543240 is an abundant number, since it is smaller than the sum of its proper divisors (511086840).

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

255543240 is a wasteful number, since it uses less digits than its factorization.

255543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129541 (or 2129537 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 255543240 is about 15985.7198774406. The cubic root of 255543240 is about 634.5825598732.

Adding to 255543240 its reverse (42345552), we get a palindrome (297888792).

The spelling of 255543240 in words is "two hundred fifty-five million, five hundred forty-three thousand, two hundred forty".