228918330643 has 2 divisors, whose sum is σ = 228918330644. Its totient is φ = 228918330642.

The previous prime is 228918330551. The next prime is 228918330647. The reversal of 228918330643 is 346033819822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228918330643 is a prime.

It is not a weakly prime, because it can be changed into another prime (228918330647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114459165321 + 114459165322.

It is an arithmetic number, because the mean of its divisors is an integer number (114459165322).

Almost surely, 2^228918330643 is an apocalyptic number.

228918330643 is a deficient number, since it is larger than the sum of its proper divisors (1).

228918330643 is an equidigital number, since it uses as much as digits as its factorization.

228918330643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 228918330643 in words is "two hundred twenty-eight billion, nine hundred eighteen million, three hundred thirty thousand, six hundred forty-three".