227396021 has 2 divisors, whose sum is σ = 227396022. Its totient is φ = 227396020.

The previous prime is 227396017. The next prime is 227396027. The reversal of 227396021 is 120693722.

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., 219336100 + 8059921 = 14810^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 227396021 - 2² = 227396017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227396027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113698010 + 113698011.

It is an arithmetic number, because the mean of its divisors is an integer number (113698011).

Almost surely, 2^227396021 is an apocalyptic number.

It is an amenable number.

227396021 is a deficient number, since it is larger than the sum of its proper divisors (1).

227396021 is an equidigital number, since it uses as much as digits as its factorization.

227396021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 227396021 is about 15079.6558647736. The cubic root of 227396021 is about 610.3715563108.

The spelling of 227396021 in words is "two hundred twenty-seven million, three hundred ninety-six thousand, twenty-one".