285572161 has 4 divisors (see below), whose sum is σ = 326368192. Its totient is φ = 244776132.

The previous prime is 285572149. The next prime is 285572173. The reversal of 285572161 is 161275582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (285572149) and next prime (285572173).

It is a cyclic number.

It is not a de Polignac number, because 285572161 - 2¹¹ = 285570113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285572161.

It is not an unprimeable number, because it can be changed into a prime (285572101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20398005 + ... + 20398018.

It is an arithmetic number, because the mean of its divisors is an integer number (81592048).

Almost surely, 2^285572161 is an apocalyptic number.

It is an amenable number.

285572161 is a deficient number, since it is larger than the sum of its proper divisors (40796031).

285572161 is an equidigital number, since it uses as much as digits as its factorization.

285572161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40796030.

The product of its digits is 33600, while the sum is 37.

The square root of 285572161 is about 16898.8804658770. The cubic root of 285572161 is about 658.5245284050.

The spelling of 285572161 in words is "two hundred eighty-five million, five hundred seventy-two thousand, one hundred sixty-one".