228085561 has 8 divisors (see below), whose sum is σ = 251971200. Its totient is φ = 204725040.

The previous prime is 228085547. The next prime is 228085589. The reversal of 228085561 is 165580822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228085561 - 2⁷ = 228085433 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 228085561.

It is not an unprimeable number, because it can be changed into a prime (228085061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130366 + ... + 132103.

It is an arithmetic number, because the mean of its divisors is an integer number (31496400).

Almost surely, 2^228085561 is an apocalyptic number.

It is an amenable number.

228085561 is a deficient number, since it is larger than the sum of its proper divisors (23885639).

228085561 is a wasteful number, since it uses less digits than its factorization.

228085561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262559.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 228085561 is about 15102.5018126137. The cubic root of 228085561 is about 610.9878832880.

The spelling of 228085561 in words is "two hundred twenty-eight million, eighty-five thousand, five hundred sixty-one".