228326581 has 16 divisors (see below), whose sum is σ = 269394048. Its totient is φ = 189446400.

The previous prime is 228326561. The next prime is 228326587. The reversal of 228326581 is 185623822.

It is a cyclic number.

It is not a de Polignac number, because 228326581 - 2⁷ = 228326453 is a prime.

It is a super-2 number, since 2×228326581² = 104266055182299122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228326581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228326587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34561 + ... + 40633.

It is an arithmetic number, because the mean of its divisors is an integer number (16837128).

Almost surely, 2^228326581 is an apocalyptic number.

It is an amenable number.

228326581 is a deficient number, since it is larger than the sum of its proper divisors (41067467).

228326581 is a wasteful number, since it uses less digits than its factorization.

228326581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6252.

The product of its digits is 46080, while the sum is 37.

The square root of 228326581 is about 15110.4791783715. The cubic root of 228326581 is about 611.2030196006.

The spelling of 228326581 in words is "two hundred twenty-eight million, three hundred twenty-six thousand, five hundred eighty-one".