205320415 has 8 divisors (see below), whose sum is σ = 252394128. Its totient is φ = 160249920.

The previous prime is 205320397. The next prime is 205320431. The reversal of 205320415 is 514023502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205320415 - 2⁹ = 205319903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 500577 + ... + 500986.

It is an arithmetic number, because the mean of its divisors is an integer number (31549266).

Almost surely, 2^205320415 is an apocalyptic number.

205320415 is a deficient number, since it is larger than the sum of its proper divisors (47073713).

205320415 is a wasteful number, since it uses less digits than its factorization.

205320415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001609.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205320415 is about 14329.0060716018. The cubic root of 205320415 is about 589.9438948852.

Adding to 205320415 its reverse (514023502), we get a palindrome (719343917).

The spelling of 205320415 in words is "two hundred five million, three hundred twenty thousand, four hundred fifteen".