205340501 has 4 divisors (see below), whose sum is σ = 217419372. Its totient is φ = 193261632.

The previous prime is 205340489. The next prime is 205340507. The reversal of 205340501 is 105043502.

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 124322500 + 81018001 = 11150^2 + 9001^2 .

It is a cyclic number.

It is not a de Polignac number, because 205340501 - 2²⁶ = 138231637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205340507) 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 3 ways as a sum of consecutive naturals, for example, 6039410 + ... + 6039443.

It is an arithmetic number, because the mean of its divisors is an integer number (54354843).

Almost surely, 2^205340501 is an apocalyptic number.

It is an amenable number.

205340501 is a deficient number, since it is larger than the sum of its proper divisors (12078871).

205340501 is a wasteful number, since it uses less digits than its factorization.

205340501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12078870.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205340501 is about 14329.7069404786. The cubic root of 205340501 is about 589.9631318531.

The spelling of 205340501 in words is "two hundred five million, three hundred forty thousand, five hundred one".