228393561 has 8 divisors (see below), whose sum is σ = 332208864. Its totient is φ = 138420320.

The previous prime is 228393527. The next prime is 228393569. The reversal of 228393561 is 165393822.

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 228393561 - 2¹⁰ = 228392537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228393569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3460476 + ... + 3460541.

It is an arithmetic number, because the mean of its divisors is an integer number (41526108).

Almost surely, 2^228393561 is an apocalyptic number.

It is an amenable number.

228393561 is a deficient number, since it is larger than the sum of its proper divisors (103815303).

228393561 is a wasteful number, since it uses less digits than its factorization.

228393561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6921031.

The product of its digits is 77760, while the sum is 39.

The square root of 228393561 is about 15112.6953585388. The cubic root of 228393561 is about 611.2627795807.

The spelling of 228393561 in words is "two hundred twenty-eight million, three hundred ninety-three thousand, five hundred sixty-one".