228542085 has 24 divisors (see below), whose sum is σ = 396722040. Its totient is φ = 121709952.

The previous prime is 228542071. The next prime is 228542087. The reversal of 228542085 is 580245822.

228542085 is a `hidden beast` number, since 228 + 5 + 420 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 45724644 + 182817441 = 6762^2 + 13521^2 .

It is not a de Polignac number, because 228542085 - 2¹⁷ = 228411013 is a prime.

It is a super-2 number, since 2×228542085² = 104462969232294450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228542087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30711 + ... + 37419.

It is an arithmetic number, because the mean of its divisors is an integer number (16530085).

Almost surely, 2^228542085 is an apocalyptic number.

It is an amenable number.

228542085 is a deficient number, since it is larger than the sum of its proper divisors (168179955).

228542085 is a wasteful number, since it uses less digits than its factorization.

228542085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7477 (or 7474 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 228542085 is about 15117.6084418138. The cubic root of 228542085 is about 611.3952519676.

The spelling of 228542085 in words is "two hundred twenty-eight million, five hundred forty-two thousand, eighty-five".