255566383 has 2 divisors, whose sum is σ = 255566384. Its totient is φ = 255566382.

The previous prime is 255566323. The next prime is 255566411. The reversal of 255566383 is 383665552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255566383 - 2¹⁷ = 255435311 is a prime.

It is a super-2 number, since 2×255566383² = 130628352239405378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255566303) 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 as a sum of consecutive naturals, namely, 127783191 + 127783192.

It is an arithmetic number, because the mean of its divisors is an integer number (127783192).

Almost surely, 2^255566383 is an apocalyptic number.

255566383 is a deficient number, since it is larger than the sum of its proper divisors (1).

255566383 is an equidigital number, since it uses as much as digits as its factorization.

255566383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 43.

The square root of 255566383 is about 15986.4437258572. The cubic root of 255566383 is about 634.6017160583.

The spelling of 255566383 in words is "two hundred fifty-five million, five hundred sixty-six thousand, three hundred eighty-three".