227721889 has 2 divisors, whose sum is σ = 227721890. Its totient is φ = 227721888.

The previous prime is 227721883. The next prime is 227721911. The reversal of 227721889 is 988127722.

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., 226201600 + 1520289 = 15040^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 227721889 - 2³ = 227721881 is a prime.

It is not a weakly prime, because it can be changed into another prime (227721881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113860944 + 113860945.

It is an arithmetic number, because the mean of its divisors is an integer number (113860945).

Almost surely, 2^227721889 is an apocalyptic number.

It is an amenable number.

227721889 is a deficient number, since it is larger than the sum of its proper divisors (1).

227721889 is an equidigital number, since it uses as much as digits as its factorization.

227721889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The square root of 227721889 is about 15090.4568850648. The cubic root of 227721889 is about 610.6629797961.

The spelling of 227721889 in words is "two hundred twenty-seven million, seven hundred twenty-one thousand, eight hundred eighty-nine".