228321641 has 4 divisors (see below), whose sum is σ = 228603984. Its totient is φ = 228039300.

The previous prime is 228321619. The next prime is 228321647. The reversal of 228321641 is 146123822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228321641 is a prime.

It is a super-3 number, since 3×228321641³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228321647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139955 + ... + 141576.

It is an arithmetic number, because the mean of its divisors is an integer number (57150996).

Almost surely, 2^228321641 is an apocalyptic number.

It is an amenable number.

228321641 is a deficient number, since it is larger than the sum of its proper divisors (282343).

228321641 is an equidigital number, since it uses as much as digits as its factorization.

228321641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282342.

The product of its digits is 4608, while the sum is 29.

The square root of 228321641 is about 15110.3157147692. The cubic root of 228321641 is about 611.1986116386.

The spelling of 228321641 in words is "two hundred twenty-eight million, three hundred twenty-one thousand, six hundred forty-one".