255785551 has 16 divisors (see below), whose sum is σ = 300906496. Its totient is φ = 212836896.

The previous prime is 255785531. The next prime is 255785567. The reversal of 255785551 is 155587552.

It is a cyclic number.

It is not a de Polignac number, because 255785551 - 2⁹ = 255785039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255785498 and 255785507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255785501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156400 + ... + 158026.

It is an arithmetic number, because the mean of its divisors is an integer number (18806656).

Almost surely, 2^255785551 is an apocalyptic number.

255785551 is a deficient number, since it is larger than the sum of its proper divisors (45120945).

255785551 is a wasteful number, since it uses less digits than its factorization.

255785551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278.

The product of its digits is 350000, while the sum is 43.

The square root of 255785551 is about 15993.2970647081. The cubic root of 255785551 is about 634.7830709606.

The spelling of 255785551 in words is "two hundred fifty-five million, seven hundred eighty-five thousand, five hundred fifty-one".