228214128954281 has 2 divisors, whose sum is σ = 228214128954282. Its totient is φ = 228214128954280.

The previous prime is 228214128954199. The next prime is 228214128954283. The reversal of 228214128954281 is 182459821412822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124907558202025 + 103306570752256 = 11176205^2 + 10163984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228214128954281 is a prime.

It is a super-2 number, since 2×228214128954281² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 228214128954283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228214128954281.

It is not a weakly prime, because it can be changed into another prime (228214128954283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114107064477140 + 114107064477141.

It is an arithmetic number, because the mean of its divisors is an integer number (114107064477141).

Almost surely, 2^{228214128954281} is an apocalyptic number.

It is an amenable number.

228214128954281 is a deficient number, since it is larger than the sum of its proper divisors (1).

228214128954281 is an equidigital number, since it uses as much as digits as its factorization.

228214128954281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11796480, while the sum is 59.

The spelling of 228214128954281 in words is "two hundred twenty-eight trillion, two hundred fourteen billion, one hundred twenty-eight million, nine hundred fifty-four thousand, two hundred eighty-one".