205501225133 has 4 divisors (see below), whose sum is σ = 206149494300. Its totient is φ = 204852955968.

The previous prime is 205501225129. The next prime is 205501225159. The reversal of 205501225133 is 331522105502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81666207529 + 123835017604 = 285773^2 + 351902^2 .

It is a cyclic number.

It is not a de Polignac number, because 205501225133 - 2² = 205501225129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205501225096 and 205501225105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205501225333) 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, 324134108 + ... + 324134741.

It is an arithmetic number, because the mean of its divisors is an integer number (51537373575).

Almost surely, 2^205501225133 is an apocalyptic number.

It is an amenable number.

205501225133 is a deficient number, since it is larger than the sum of its proper divisors (648269167).

205501225133 is an equidigital number, since it uses as much as digits as its factorization.

205501225133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648269166.

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 205501225133 in words is "two hundred five billion, five hundred one million, two hundred twenty-five thousand, one hundred thirty-three".