205540315 has 8 divisors (see below), whose sum is σ = 246745008. Its totient is φ = 164367840.

The previous prime is 205540303. The next prime is 205540327. The reversal of 205540315 is 513045502.

It is an interprime number because it is at equal distance from previous prime (205540303) and next prime (205540327).

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

It is not a de Polignac number, because 205540315 - 2¹³ = 205532123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205540315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9444 + ... + 22366.

It is an arithmetic number, because the mean of its divisors is an integer number (30843126).

Almost surely, 2^205540315 is an apocalyptic number.

205540315 is a deficient number, since it is larger than the sum of its proper divisors (41204693).

205540315 is a wasteful number, since it uses less digits than its factorization.

205540315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16109.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 205540315 is about 14336.6772649732. The cubic root of 205540315 is about 590.1544314694.

Adding to 205540315 its reverse (513045502), we get a palindrome (718585817).

The spelling of 205540315 in words is "two hundred five million, five hundred forty thousand, three hundred fifteen".