255555533 has 2 divisors, whose sum is σ = 255555534. Its totient is φ = 255555532.

The previous prime is 255555473. The next prime is 255555647. The reversal of 255555533 is 335555552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195384484 + 60171049 = 13978^2 + 7757^2 .

It is a cyclic number.

It is not a de Polignac number, because 255555533 - 2¹² = 255551437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255555233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127777766 + 127777767.

It is an arithmetic number, because the mean of its divisors is an integer number (127777767).

Almost surely, 2^255555533 is an apocalyptic number.

It is an amenable number.

255555533 is a deficient number, since it is larger than the sum of its proper divisors (1).

255555533 is an equidigital number, since it uses as much as digits as its factorization.

255555533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 281250, while the sum is 38.

The square root of 255555533 is about 15986.1043722353. The cubic root of 255555533 is about 634.5927353179.

The spelling of 255555533 in words is "two hundred fifty-five million, five hundred fifty-five thousand, five hundred thirty-three".