228131710787 has 2 divisors, whose sum is σ = 228131710788. Its totient is φ = 228131710786.

The previous prime is 228131710727. The next prime is 228131710811. The reversal of 228131710787 is 787017131822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228131710787 is a prime.

It is not a weakly prime, because it can be changed into another prime (228131710727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114065855393 + 114065855394.

It is an arithmetic number, because the mean of its divisors is an integer number (114065855394).

Almost surely, 2^228131710787 is an apocalyptic number.

228131710787 is a deficient number, since it is larger than the sum of its proper divisors (1).

228131710787 is an equidigital number, since it uses as much as digits as its factorization.

228131710787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 263424, while the sum is 47.

The spelling of 228131710787 in words is "two hundred twenty-eight billion, one hundred thirty-one million, seven hundred ten thousand, seven hundred eighty-seven".