205303231 has 8 divisors (see below), whose sum is σ = 234736640. Its totient is φ = 175895928.

The previous prime is 205303223. The next prime is 205303249. The reversal of 205303231 is 132303502.

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

It is a cyclic number.

It is not a de Polignac number, because 205303231 - 2³ = 205303223 is a prime.

It is a super-2 number, since 2×205303231² = 84298833318078722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205303199 and 205303208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205303261) 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, 15130 + ... + 25288.

It is an arithmetic number, because the mean of its divisors is an integer number (29342080).

Almost surely, 2^205303231 is an apocalyptic number.

205303231 is a deficient number, since it is larger than the sum of its proper divisors (29433409).

205303231 is a wasteful number, since it uses less digits than its factorization.

205303231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13053.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 205303231 is about 14328.4064361673. The cubic root of 205303231 is about 589.9274362544.

Adding to 205303231 its reverse (132303502), we get a palindrome (337606733).

The spelling of 205303231 in words is "two hundred five million, three hundred three thousand, two hundred thirty-one".