228544222445831 has 2 divisors, whose sum is σ = 228544222445832. Its totient is φ = 228544222445830.

The previous prime is 228544222445789. The next prime is 228544222445899. The reversal of 228544222445831 is 138544222445822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228544222445831 is a prime.

It is a super-2 number, since 2×228544222445831² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228544222441831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114272111222915 + 114272111222916.

It is an arithmetic number, because the mean of its divisors is an integer number (114272111222916).

Almost surely, 2^{228544222445831} is an apocalyptic number.

228544222445831 is a deficient number, since it is larger than the sum of its proper divisors (1).

228544222445831 is an equidigital number, since it uses as much as digits as its factorization.

228544222445831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39321600, while the sum is 56.

Subtracting from 228544222445831 its reverse (138544222445822), we obtain a palindrome (90000000000009).

The spelling of 228544222445831 in words is "two hundred twenty-eight trillion, five hundred forty-four billion, two hundred twenty-two million, four hundred forty-five thousand, eight hundred thirty-one".