228128006443 has 2 divisors, whose sum is σ = 228128006444. Its totient is φ = 228128006442.

The previous prime is 228128006429. The next prime is 228128006459. The reversal of 228128006443 is 344600821822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228128006443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228128006396 and 228128006405.

It is not a weakly prime, because it can be changed into another prime (228128009443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114064003221 + 114064003222.

It is an arithmetic number, because the mean of its divisors is an integer number (114064003222).

Almost surely, 2^228128006443 is an apocalyptic number.

228128006443 is a deficient number, since it is larger than the sum of its proper divisors (1).

228128006443 is an equidigital number, since it uses as much as digits as its factorization.

228128006443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 228128006443 in words is "two hundred twenty-eight billion, one hundred twenty-eight million, six thousand, four hundred forty-three".