227643314861 has 2 divisors, whose sum is σ = 227643314862. Its totient is φ = 227643314860.

The previous prime is 227643314839. The next prime is 227643314863. The reversal of 227643314861 is 168413346722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205648645225 + 21994669636 = 453485^2 + 148306^2 .

It is a cyclic number.

It is not a de Polignac number, because 227643314861 - 2¹⁸ = 227643052717 is a prime.

Together with 227643314863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227643314863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113821657430 + 113821657431.

It is an arithmetic number, because the mean of its divisors is an integer number (113821657431).

Almost surely, 2^227643314861 is an apocalyptic number.

It is an amenable number.

227643314861 is a deficient number, since it is larger than the sum of its proper divisors (1).

227643314861 is an equidigital number, since it uses as much as digits as its factorization.

227643314861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 47.

The spelling of 227643314861 in words is "two hundred twenty-seven billion, six hundred forty-three million, three hundred fourteen thousand, eight hundred sixty-one".