205002051 has 4 divisors (see below), whose sum is σ = 273336072. Its totient is φ = 136668032.

The previous prime is 205002043. The next prime is 205002053. The reversal of 205002051 is 150200502.

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

It is a cyclic number.

It is not a de Polignac number, because 205002051 - 2³ = 205002043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205002051.

It is not an unprimeable number, because it can be changed into a prime (205002053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34167006 + ... + 34167011.

It is an arithmetic number, because the mean of its divisors is an integer number (68334018).

Almost surely, 2^205002051 is an apocalyptic number.

205002051 is a deficient number, since it is larger than the sum of its proper divisors (68334021).

205002051 is an equidigital number, since it uses as much as digits as its factorization.

205002051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68334020.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 205002051 is about 14317.8926871240. The cubic root of 205002051 is about 589.6388204054.

Adding to 205002051 its reverse (150200502), we get a palindrome (355202553).

The spelling of 205002051 in words is "two hundred five million, two thousand, fifty-one".