255500400 has 60 divisors (see below), whose sum is σ = 818456792. Its totient is φ = 68133120.

The previous prime is 255500393. The next prime is 255500417. The reversal of 255500400 is 4005552.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105259 + ... + 107658.

Almost surely, 2^255500400 is an apocalyptic number.

255500400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255500400 is an abundant number, since it is smaller than the sum of its proper divisors (562956392).

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

255500400 is a wasteful number, since it uses less digits than its factorization.

255500400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212938 (or 212927 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 255500400 is about 15984.3798753658. The cubic root of 255500400 is about 634.5470968126.

Adding to 255500400 its reverse (4005552), we get a palindrome (259505952).

The spelling of 255500400 in words is "two hundred fifty-five million, five hundred thousand, four hundred".