228888870631 has 2 divisors, whose sum is σ = 228888870632. Its totient is φ = 228888870630.

The previous prime is 228888870629. The next prime is 228888870643. The reversal of 228888870631 is 136078888822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228888870631 - 2¹ = 228888870629 is a prime.

It is a super-2 number, since 2×228888870631² (a number of 24 digits) contains 22 as substring.

Together with 228888870629, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 228888870631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228888870031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114444435315 + 114444435316.

It is an arithmetic number, because the mean of its divisors is an integer number (114444435316).

Almost surely, 2^228888870631 is an apocalyptic number.

228888870631 is a deficient number, since it is larger than the sum of its proper divisors (1).

228888870631 is an equidigital number, since it uses as much as digits as its factorization.

228888870631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16515072, while the sum is 61.

The spelling of 228888870631 in words is "two hundred twenty-eight billion, eight hundred eighty-eight million, eight hundred seventy thousand, six hundred thirty-one".