205254525256311 has 4 divisors (see below), whose sum is σ = 273672700341752. Its totient is φ = 136836350170872.

The previous prime is 205254525256309. The next prime is 205254525256369. The reversal of 205254525256311 is 113652525452502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 205254525256311 - 2¹ = 205254525256309 is a prime.

It is a super-2 number, since 2×205254525256311² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205254525256381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34209087542716 + ... + 34209087542721.

It is an arithmetic number, because the mean of its divisors is an integer number (68418175085438).

Almost surely, 2^{205254525256311} is an apocalyptic number.

205254525256311 is a deficient number, since it is larger than the sum of its proper divisors (68418175085441).

205254525256311 is an equidigital number, since it uses as much as digits as its factorization.

205254525256311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68418175085440.

The product of its (nonzero) digits is 3600000, while the sum is 48.

The spelling of 205254525256311 in words is "two hundred five trillion, two hundred fifty-four billion, five hundred twenty-five million, two hundred fifty-six thousand, three hundred eleven".