205122255 has 64 divisors (see below), whose sum is σ = 383201280. Its totient is φ = 92768256.

The previous prime is 205122251. The next prime is 205122277. The reversal of 205122255 is 552221502.

It is not a de Polignac number, because 205122255 - 2² = 205122251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205122251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 141826 + ... + 143264.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^205122255 is an apocalyptic number.

205122255 is a deficient number, since it is larger than the sum of its proper divisors (178079025).

205122255 is a wasteful number, since it uses less digits than its factorization.

205122255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205122255 is about 14322.0897567359. The cubic root of 205122255 is about 589.7540437994.

Adding to 205122255 its reverse (552221502), we get a palindrome (757343757).

The spelling of 205122255 in words is "two hundred five million, one hundred twenty-two thousand, two hundred fifty-five".