205231275 has 36 divisors (see below), whose sum is σ = 368364568. Its totient is φ = 109226880.

The previous prime is 205231249. The next prime is 205231291. The reversal of 205231275 is 572132502.

It is not a de Polignac number, because 205231275 - 2⁹ = 205230763 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 198159 + ... + 199191.

Almost surely, 2^205231275 is an apocalyptic number.

205231275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

205231275 is a deficient number, since it is larger than the sum of its proper divisors (163133293).

205231275 is a wasteful number, since it uses less digits than its factorization.

205231275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932 (or 1924 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 205231275 is about 14325.8952599829. The cubic root of 205231275 is about 589.8585076772.

Adding to 205231275 its reverse (572132502), we get a palindrome (777363777).

The spelling of 205231275 in words is "two hundred five million, two hundred thirty-one thousand, two hundred seventy-five".