255507551 has 12 divisors (see below), whose sum is σ = 277534872. Its totient is φ = 235119456.

The previous prime is 255507523. The next prime is 255507563. The reversal of 255507551 is 155705552.

It is not a de Polignac number, because 255507551 - 2¹⁰ = 255506527 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 (255507521) 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 11 ways as a sum of consecutive naturals, for example, 56465 + ... + 60821.

It is an arithmetic number, because the mean of its divisors is an integer number (23127906).

Almost surely, 2^255507551 is an apocalyptic number.

255507551 is a deficient number, since it is larger than the sum of its proper divisors (22027321).

255507551 is a wasteful number, since it uses less digits than its factorization.

255507551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730 (or 4717 counting only the distinct ones).

The product of its (nonzero) digits is 43750, while the sum is 35.

The square root of 255507551 is about 15984.6035609270. The cubic root of 255507551 is about 634.5530167042.

The spelling of 255507551 in words is "two hundred fifty-five million, five hundred seven thousand, five hundred fifty-one".