228240939089831 has 2 divisors, whose sum is σ = 228240939089832. Its totient is φ = 228240939089830.

The previous prime is 228240939089717. The next prime is 228240939089869. The reversal of 228240939089831 is 138980939042822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228240939089831 is a prime.

It is a super-2 number, since 2×228240939089831² (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 (228240939089231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114120469544915 + 114120469544916.

It is an arithmetic number, because the mean of its divisors is an integer number (114120469544916).

Almost surely, 2^{228240939089831} is an apocalyptic number.

228240939089831 is a deficient number, since it is larger than the sum of its proper divisors (1).

228240939089831 is an equidigital number, since it uses as much as digits as its factorization.

228240939089831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107495424, while the sum is 68.

The spelling of 228240939089831 in words is "two hundred twenty-eight trillion, two hundred forty billion, nine hundred thirty-nine million, eighty-nine thousand, eight hundred thirty-one".