228074321 has 4 divisors (see below), whose sum is σ = 228897972. Its totient is φ = 227250672.

The previous prime is 228074311. The next prime is 228074339. The reversal of 228074321 is 123470822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123470822 = 2 ⋅61735411.

It can be written as a sum of positive squares in 2 ways, for example, as 44742721 + 183331600 = 6689^2 + 13540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228074321 is a prime.

It is a super-2 number, since 2×228074321² = 104035791799222082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228074311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411410 + ... + 411963.

It is an arithmetic number, because the mean of its divisors is an integer number (57224493).

Almost surely, 2^228074321 is an apocalyptic number.

It is an amenable number.

228074321 is a deficient number, since it is larger than the sum of its proper divisors (823651).

228074321 is an equidigital number, since it uses as much as digits as its factorization.

228074321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823650.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 228074321 is about 15102.1296842531. The cubic root of 228074321 is about 610.9778466792.

The spelling of 228074321 in words is "two hundred twenty-eight million, seventy-four thousand, three hundred twenty-one".