255777433 has 2 divisors, whose sum is σ = 255777434. Its totient is φ = 255777432.

The previous prime is 255777413. The next prime is 255777439. The reversal of 255777433 is 334777552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196364169 + 59413264 = 14013^2 + 7708^2 .

It is a cyclic number.

It is not a de Polignac number, because 255777433 - 2¹⁷ = 255646361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255777433.

It is not a weakly prime, because it can be changed into another prime (255777439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127888716 + 127888717.

It is an arithmetic number, because the mean of its divisors is an integer number (127888717).

Almost surely, 2^255777433 is an apocalyptic number.

It is an amenable number.

255777433 is a deficient number, since it is larger than the sum of its proper divisors (1).

255777433 is an equidigital number, since it uses as much as digits as its factorization.

255777433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 43.

The square root of 255777433 is about 15993.0432688716. The cubic root of 255777433 is about 634.7763554087.

The spelling of 255777433 in words is "two hundred fifty-five million, seven hundred seventy-seven thousand, four hundred thirty-three".