205140265 has 32 divisors (see below), whose sum is σ = 274959360. Its totient is φ = 145675200.

The previous prime is 205140253. The next prime is 205140269. The reversal of 205140265 is 562041502.

It is not a de Polignac number, because 205140265 - 2⁷ = 205140137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205140269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659460 + ... + 659770.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^205140265 is an apocalyptic number.

It is an amenable number.

205140265 is a deficient number, since it is larger than the sum of its proper divisors (69819095).

205140265 is a wasteful number, since it uses less digits than its factorization.

205140265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 205140265 is about 14322.7184919623. The cubic root of 205140265 is about 589.7713036842.

Adding to 205140265 its reverse (562041502), we get a palindrome (767181767).

The spelling of 205140265 in words is "two hundred five million, one hundred forty thousand, two hundred sixty-five".