205069531 has 2 divisors, whose sum is σ = 205069532. Its totient is φ = 205069530.

The previous prime is 205069523. The next prime is 205069559. The reversal of 205069531 is 135960502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205069531 - 2³ = 205069523 is a prime.

It is a super-2 number, since 2×205069531² = 84107025089119922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205069493 and 205069502.

It is not a weakly prime, because it can be changed into another prime (205069231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102534765 + 102534766.

It is an arithmetic number, because the mean of its divisors is an integer number (102534766).

Almost surely, 2^205069531 is an apocalyptic number.

205069531 is a deficient number, since it is larger than the sum of its proper divisors (1).

205069531 is an equidigital number, since it uses as much as digits as its factorization.

205069531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 205069531 is about 14320.2489852656. The cubic root of 205069531 is about 589.7035099414.

The spelling of 205069531 in words is "two hundred five million, sixty-nine thousand, five hundred thirty-one".