255505387 has 8 divisors (see below), whose sum is σ = 262811952. Its totient is φ = 248220000.

The previous prime is 255505381. The next prime is 255505391. The reversal of 255505387 is 783505552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255505387 - 2⁷ = 255505259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255505381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21012 + ... + 30862.

It is an arithmetic number, because the mean of its divisors is an integer number (32851494).

Almost surely, 2^255505387 is an apocalyptic number.

255505387 is a deficient number, since it is larger than the sum of its proper divisors (7306565).

255505387 is an equidigital number, since it uses as much as digits as its factorization.

255505387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10589.

The product of its (nonzero) digits is 210000, while the sum is 40.

The square root of 255505387 is about 15984.5358706470. The cubic root of 255505387 is about 634.5512252677.

The spelling of 255505387 in words is "two hundred fifty-five million, five hundred five thousand, three hundred eighty-seven".