227785081 has 2 divisors, whose sum is σ = 227785082. Its totient is φ = 227785080.

The previous prime is 227785079. The next prime is 227785093. The reversal of 227785081 is 180587722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177955600 + 49829481 = 13340^2 + 7059^2 .

It is a cyclic number.

It is not a de Polignac number, because 227785081 - 2¹ = 227785079 is a prime.

It is a super-2 number, since 2×227785081² = 103772086252353122, which contains 22 as substring.

Together with 227785079, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (227785001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113892540 + 113892541.

It is an arithmetic number, because the mean of its divisors is an integer number (113892541).

Almost surely, 2^227785081 is an apocalyptic number.

It is an amenable number.

227785081 is a deficient number, since it is larger than the sum of its proper divisors (1).

227785081 is an equidigital number, since it uses as much as digits as its factorization.

227785081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 227785081 is about 15092.5505134156. The cubic root of 227785081 is about 610.7194601609.

The spelling of 227785081 in words is "two hundred twenty-seven million, seven hundred eighty-five thousand, eighty-one".