227812421 has 2 divisors, whose sum is σ = 227812422. Its totient is φ = 227812420.

The previous prime is 227812411. The next prime is 227812423. The reversal of 227812421 is 124218722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145202500 + 82609921 = 12050^2 + 9089^2 .

It is a cyclic number.

It is not a de Polignac number, because 227812421 - 2¹⁸ = 227550277 is a prime.

Together with 227812423, 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 (227812423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113906210 + 113906211.

It is an arithmetic number, because the mean of its divisors is an integer number (113906211).

Almost surely, 2^227812421 is an apocalyptic number.

It is an amenable number.

227812421 is a deficient number, since it is larger than the sum of its proper divisors (1).

227812421 is an equidigital number, since it uses as much as digits as its factorization.

227812421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 29.

The square root of 227812421 is about 15093.4562310956. The cubic root of 227812421 is about 610.7438931366.

The spelling of 227812421 in words is "two hundred twenty-seven million, eight hundred twelve thousand, four hundred twenty-one".