255005551 has 8 divisors (see below), whose sum is σ = 259114544. Its totient is φ = 250905600.

The previous prime is 255005549. The next prime is 255005557. The reversal of 255005551 is 155500552.

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 255005551 - 2¹ = 255005549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255005557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75601 + ... + 78901.

It is an arithmetic number, because the mean of its divisors is an integer number (32389318).

Almost surely, 2^255005551 is an apocalyptic number.

255005551 is a deficient number, since it is larger than the sum of its proper divisors (4108993).

255005551 is a wasteful number, since it uses less digits than its factorization.

255005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 255005551 is about 15968.8932302774. The cubic root of 255005551 is about 634.1371719037.

The spelling of 255005551 in words is "two hundred fifty-five million, five thousand, five hundred fifty-one".