205195291 has 16 divisors (see below), whose sum is σ = 241574400. Its totient is φ = 174206760.

The previous prime is 205195273. The next prime is 205195301. The reversal of 205195291 is 192591502.

It is not a de Polignac number, because 205195291 - 2⁷ = 205195163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205195391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33906 + ... + 39496.

It is an arithmetic number, because the mean of its divisors is an integer number (15098400).

Almost surely, 2^205195291 is an apocalyptic number.

205195291 is a deficient number, since it is larger than the sum of its proper divisors (36379109).

205195291 is an equidigital number, since it uses as much as digits as its factorization.

205195291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719 (or 5705 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 205195291 is about 14324.6392973785. The cubic root of 205195291 is about 589.8240315978.

The spelling of 205195291 in words is "two hundred five million, one hundred ninety-five thousand, two hundred ninety-one".