255860477 has 2 divisors, whose sum is σ = 255860478. Its totient is φ = 255860476.

The previous prime is 255860461. The next prime is 255860483. The reversal of 255860477 is 774068552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255808036 + 52441 = 15994^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 255860477 - 2⁴ = 255860461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255860447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127930238 + 127930239.

It is an arithmetic number, because the mean of its divisors is an integer number (127930239).

Almost surely, 2^255860477 is an apocalyptic number.

It is an amenable number.

255860477 is a deficient number, since it is larger than the sum of its proper divisors (1).

255860477 is an equidigital number, since it uses as much as digits as its factorization.

255860477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 44.

The square root of 255860477 is about 15995.6393120125. The cubic root of 255860477 is about 634.8450462011.

The spelling of 255860477 in words is "two hundred fifty-five million, eight hundred sixty thousand, four hundred seventy-seven".