227939681 has 4 divisors (see below), whose sum is σ = 235799700. Its totient is φ = 220079664.

The previous prime is 227939671. The next prime is 227939687. The reversal of 227939681 is 186939722.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115240225 + 112699456 = 10735^2 + 10616^2 .

It is a cyclic number.

It is not a de Polignac number, because 227939681 - 2⁶ = 227939617 is a prime.

It is a super-2 number, since 2×227939681² = 103912996348763522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (227939687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3929966 + ... + 3930023.

It is an arithmetic number, because the mean of its divisors is an integer number (58949925).

Almost surely, 2^227939681 is an apocalyptic number.

It is an amenable number.

227939681 is a deficient number, since it is larger than the sum of its proper divisors (7860019).

227939681 is an equidigital number, since it uses as much as digits as its factorization.

227939681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860018.

The product of its digits is 326592, while the sum is 47.

The square root of 227939681 is about 15097.6713767389. The cubic root of 227939681 is about 610.8575960382.

The spelling of 227939681 in words is "two hundred twenty-seven million, nine hundred thirty-nine thousand, six hundred eighty-one".