205134231 has 16 divisors (see below), whose sum is σ = 278246880. Its totient is φ = 134407680.

The previous prime is 205134229. The next prime is 205134233. The reversal of 205134231 is 132431502.

205134231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205134229) and next prime (205134233).

It is not a de Polignac number, because 205134231 - 2¹ = 205134229 is a prime.

It is a super-2 number, since 2×205134231² = 84160105455922722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205134198 and 205134207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205134233) 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, 43971 + ... + 48411.

It is an arithmetic number, because the mean of its divisors is an integer number (17390430).

Almost surely, 2^205134231 is an apocalyptic number.

205134231 is a deficient number, since it is larger than the sum of its proper divisors (73112649).

205134231 is a wasteful number, since it uses less digits than its factorization.

205134231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 205134231 is about 14322.5078460443. The cubic root of 205134231 is about 589.7655211124.

Adding to 205134231 its reverse (132431502), we get a palindrome (337565733).

The spelling of 205134231 in words is "two hundred five million, one hundred thirty-four thousand, two hundred thirty-one".