205251315 has 16 divisors (see below), whose sum is σ = 329458848. Its totient is φ = 109115136.

The previous prime is 205251313. The next prime is 205251317. The reversal of 205251315 is 513152502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (205251313) and next prime (205251317).

It is not a de Polignac number, because 205251315 - 2¹ = 205251313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205251313) 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 15 ways as a sum of consecutive naturals, for example, 17164 + ... + 26553.

It is an arithmetic number, because the mean of its divisors is an integer number (20591178).

Almost surely, 2^205251315 is an apocalyptic number.

205251315 is a deficient number, since it is larger than the sum of its proper divisors (124207533).

205251315 is a wasteful number, since it uses less digits than its factorization.

205251315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44038.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 205251315 is about 14326.5946756373. The cubic root of 205251315 is about 589.8777061477.

The spelling of 205251315 in words is "two hundred five million, two hundred fifty-one thousand, three hundred fifteen".