227575981 has 2 divisors, whose sum is σ = 227575982. Its totient is φ = 227575980.

The previous prime is 227575979. The next prime is 227576009. The reversal of 227575981 is 189575722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227255625 + 320356 = 15075^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 227575981 - 2¹ = 227575979 is a prime.

It is a super-2 number, since 2×227575981² = 103581654256224722, which contains 22 as substring.

Together with 227575979, 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 (227575781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113787990 + 113787991.

It is an arithmetic number, because the mean of its divisors is an integer number (113787991).

Almost surely, 2^227575981 is an apocalyptic number.

It is an amenable number.

227575981 is a deficient number, since it is larger than the sum of its proper divisors (1).

227575981 is an equidigital number, since it uses as much as digits as its factorization.

227575981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 46.

The square root of 227575981 is about 15085.6216643531. The cubic root of 227575981 is about 610.5325287870.

The spelling of 227575981 in words is "two hundred twenty-seven million, five hundred seventy-five thousand, nine hundred eighty-one".