227796721 has 2 divisors, whose sum is σ = 227796722. Its totient is φ = 227796720.

The previous prime is 227796691. The next prime is 227796727. The reversal of 227796721 is 127697722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178516321 + 49280400 = 13361^2 + 7020^2 .

It is a cyclic number.

It is not a de Polignac number, because 227796721 - 2⁵ = 227796689 is a prime.

It is not a weakly prime, because it can be changed into another prime (227796727) 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, 113898360 + 113898361.

It is an arithmetic number, because the mean of its divisors is an integer number (113898361).

Almost surely, 2^227796721 is an apocalyptic number.

It is an amenable number.

227796721 is a deficient number, since it is larger than the sum of its proper divisors (1).

227796721 is an equidigital number, since it uses as much as digits as its factorization.

227796721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 43.

The square root of 227796721 is about 15092.9361291963. The cubic root of 227796721 is about 610.7298627348.

The spelling of 227796721 in words is "two hundred twenty-seven million, seven hundred ninety-six thousand, seven hundred twenty-one".