227918479381 has 2 divisors, whose sum is σ = 227918479382. Its totient is φ = 227918479380.

The previous prime is 227918479363. The next prime is 227918479387. The reversal of 227918479381 is 183974819722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212253704100 + 15664775281 = 460710^2 + 125159^2 .

It is a cyclic number.

It is not a de Polignac number, because 227918479381 - 2⁷ = 227918479253 is a prime.

It is a super-2 number, since 2×227918479381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227918479387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113959239690 + 113959239691.

It is an arithmetic number, because the mean of its divisors is an integer number (113959239691).

Almost surely, 2^227918479381 is an apocalyptic number.

It is an amenable number.

227918479381 is a deficient number, since it is larger than the sum of its proper divisors (1).

227918479381 is an equidigital number, since it uses as much as digits as its factorization.

227918479381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 61.

The spelling of 227918479381 in words is "two hundred twenty-seven billion, nine hundred eighteen million, four hundred seventy-nine thousand, three hundred eighty-one".