205145255 has 16 divisors (see below), whose sum is σ = 281703744. Its totient is φ = 140490240.

The previous prime is 205145249. The next prime is 205145323. The reversal of 205145255 is 552541502.

It is not a de Polignac number, because 205145255 - 2¹⁸ = 204883111 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 27509 + ... + 34161.

It is an arithmetic number, because the mean of its divisors is an integer number (17606484).

Almost surely, 2^205145255 is an apocalyptic number.

205145255 is a deficient number, since it is larger than the sum of its proper divisors (76558489).

205145255 is an equidigital number, since it uses as much as digits as its factorization.

205145255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 205145255 is about 14322.8926896769. The cubic root of 205145255 is about 589.7760856723.

Adding to 205145255 its reverse (552541502), we get a palindrome (757686757).

The spelling of 205145255 in words is "two hundred five million, one hundred forty-five thousand, two hundred fifty-five".