205320531 has 16 divisors (see below), whose sum is σ = 299819520. Its totient is φ = 124208160.

The previous prime is 205320529. The next prime is 205320547. The reversal of 205320531 is 135023502.

205320531 = T₁₀ + T₁₁ + ... + T₁₀₇₁.

It is not a de Polignac number, because 205320531 - 2¹ = 205320529 is a prime.

It is a super-2 number, since 2×205320531² = 84313040900243922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205320498 and 205320507.

It is not an unprimeable number, because it can be changed into a prime (205320431) 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, 42315 + ... + 46916.

It is an arithmetic number, because the mean of its divisors is an integer number (18738720).

Almost surely, 2^205320531 is an apocalyptic number.

205320531 is a deficient number, since it is larger than the sum of its proper divisors (94498989).

205320531 is a wasteful number, since it uses less digits than its factorization.

205320531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89306.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 205320531 is about 14329.0101193348. The cubic root of 205320531 is about 589.9440059855.

The spelling of 205320531 in words is "two hundred five million, three hundred twenty thousand, five hundred thirty-one".