255778351 has 2 divisors, whose sum is σ = 255778352. Its totient is φ = 255778350.

The previous prime is 255778343. The next prime is 255778357. The reversal of 255778351 is 153877552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255778351 - 2³ = 255778343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255778298 and 255778307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255778357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127889175 + 127889176.

It is an arithmetic number, because the mean of its divisors is an integer number (127889176).

Almost surely, 2^255778351 is an apocalyptic number.

255778351 is a deficient number, since it is larger than the sum of its proper divisors (1).

255778351 is an equidigital number, since it uses as much as digits as its factorization.

255778351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294000, while the sum is 43.

The square root of 255778351 is about 15993.0719688245. The cubic root of 255778351 is about 634.7771148241. Note that the first 3 decimals are identical.

It can be divided in two parts, 2557 and 78351, that added together give a palindrome (80908).

The spelling of 255778351 in words is "two hundred fifty-five million, seven hundred seventy-eight thousand, three hundred fifty-one".