205140611 has 8 divisors (see below), whose sum is σ = 230526240. Its totient is φ = 181127232.

The previous prime is 205140601. The next prime is 205140613. The reversal of 205140611 is 116041502.

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

It is not a de Polignac number, because 205140611 - 2¹⁸ = 204878467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205140613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342746 + ... + 343343.

It is an arithmetic number, because the mean of its divisors is an integer number (28815780).

Almost surely, 2^205140611 is an apocalyptic number.

205140611 is a deficient number, since it is larger than the sum of its proper divisors (25385629).

205140611 is a wasteful number, since it uses less digits than its factorization.

205140611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686125.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 205140611 is about 14322.7305706698. The cubic root of 205140611 is about 589.7716352634.

The spelling of 205140611 in words is "two hundred five million, one hundred forty thousand, six hundred eleven".