285301081 has 4 divisors (see below), whose sum is σ = 307247332. Its totient is φ = 263354832.

The previous prime is 285301057. The next prime is 285301099. The reversal of 285301081 is 180103582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180103582 = 2 ⋅90051791.

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 273604681 = 3420^2 + 16541^2 .

It is not a de Polignac number, because 285301081 - 2⁹ = 285300569 is a prime.

It is a super-2 number, since 2×285301081² = 162793413639537122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285301031) 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, 10973106 + ... + 10973131.

It is an arithmetic number, because the mean of its divisors is an integer number (76811833).

Almost surely, 2^285301081 is an apocalyptic number.

It is an amenable number.

285301081 is a deficient number, since it is larger than the sum of its proper divisors (21946251).

285301081 is a wasteful number, since it uses less digits than its factorization.

285301081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21946250.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 285301081 is about 16890.8579119002. The cubic root of 285301081 is about 658.3160938212.

The spelling of 285301081 in words is "two hundred eighty-five million, three hundred one thousand, eighty-one".