285500161 has 2 divisors, whose sum is σ = 285500162. Its totient is φ = 285500160.

The previous prime is 285500141. The next prime is 285500183. The reversal of 285500161 is 161005582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183873600 + 101626561 = 13560^2 + 10081^2 .

It is a cyclic number.

It is not a de Polignac number, because 285500161 - 2⁵ = 285500129 is a prime.

It is not a weakly prime, because it can be changed into another prime (285500101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142750080 + 142750081.

It is an arithmetic number, because the mean of its divisors is an integer number (142750081).

Almost surely, 2^285500161 is an apocalyptic number.

It is an amenable number.

285500161 is a deficient number, since it is larger than the sum of its proper divisors (1).

285500161 is an equidigital number, since it uses as much as digits as its factorization.

285500161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 285500161 is about 16896.7500129463. The cubic root of 285500161 is about 658.4691801628.

The spelling of 285500161 in words is "two hundred eighty-five million, five hundred thousand, one hundred sixty-one".