227538809 has 2 divisors, whose sum is σ = 227538810. Its totient is φ = 227538808.

The previous prime is 227538803. The next prime is 227538823. The reversal of 227538809 is 908835722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219128809 + 8410000 = 14803^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 227538809 - 2¹⁶ = 227473273 is a prime.

It is a super-2 number, since 2×227538809² = 103547819202276962, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 227538809.

It is not a weakly prime, because it can be changed into another prime (227538803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113769404 + 113769405.

It is an arithmetic number, because the mean of its divisors is an integer number (113769405).

Almost surely, 2^227538809 is an apocalyptic number.

It is an amenable number.

227538809 is a deficient number, since it is larger than the sum of its proper divisors (1).

227538809 is an equidigital number, since it uses as much as digits as its factorization.

227538809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 227538809 is about 15084.3895799598. The cubic root of 227538809 is about 610.4992857491.

The spelling of 227538809 in words is "two hundred twenty-seven million, five hundred thirty-eight thousand, eight hundred nine".