205240299 has 16 divisors (see below), whose sum is σ = 314244480. Its totient is φ = 117840960.

The previous prime is 205240297. The next prime is 205240307. The reversal of 205240299 is 992042502.

It is not a de Polignac number, because 205240299 - 2¹ = 205240297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (205240297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163042 + ... + 164295.

It is an arithmetic number, because the mean of its divisors is an integer number (19640280).

Almost surely, 2^205240299 is an apocalyptic number.

205240299 is a deficient number, since it is larger than the sum of its proper divisors (109004181).

205240299 is a wasteful number, since it uses less digits than its factorization.

205240299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327370.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 205240299 is about 14326.2102106593. The cubic root of 205240299 is about 589.8671528917.

The spelling of 205240299 in words is "two hundred five million, two hundred forty thousand, two hundred ninety-nine".