205172263 has 4 divisors (see below), whose sum is σ = 205262248. Its totient is φ = 205082280.

The previous prime is 205172257. The next prime is 205172273. The reversal of 205172263 is 362271502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362271502 = 2 ⋅181135751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205172263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205172273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41481 + ... + 46162.

It is an arithmetic number, because the mean of its divisors is an integer number (51315562).

Almost surely, 2^205172263 is an apocalyptic number.

205172263 is a deficient number, since it is larger than the sum of its proper divisors (89985).

205172263 is an equidigital number, since it uses as much as digits as its factorization.

205172263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89984.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 205172263 is about 14323.8354849530. The cubic root of 205172263 is about 589.8019664782.

The spelling of 205172263 in words is "two hundred five million, one hundred seventy-two thousand, two hundred sixty-three".