255205729 has 2 divisors, whose sum is σ = 255205730. Its totient is φ = 255205728.

The previous prime is 255205711. The next prime is 255205757. The reversal of 255205729 is 927502552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165714129 + 89491600 = 12873^2 + 9460^2 .

It is a cyclic number.

It is not a de Polignac number, because 255205729 - 2⁵ = 255205697 is a prime.

It is a super-2 number, since 2×255205729² = 130259928228842882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255205799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127602864 + 127602865.

It is an arithmetic number, because the mean of its divisors is an integer number (127602865).

Almost surely, 2^255205729 is an apocalyptic number.

It is an amenable number.

255205729 is a deficient number, since it is larger than the sum of its proper divisors (1).

255205729 is an equidigital number, since it uses as much as digits as its factorization.

255205729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 255205729 is about 15975.1597488100. The cubic root of 255205729 is about 634.3030599389.

The spelling of 255205729 in words is "two hundred fifty-five million, two hundred five thousand, seven hundred twenty-nine".