226274221 has 2 divisors, whose sum is σ = 226274222. Its totient is φ = 226274220.

The previous prime is 226274219. The next prime is 226274297. The reversal of 226274221 is 122472622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225900900 + 373321 = 15030^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 226274221 - 2¹ = 226274219 is a prime.

Together with 226274219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 226274221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226274201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113137110 + 113137111.

It is an arithmetic number, because the mean of its divisors is an integer number (113137111).

Almost surely, 2^226274221 is an apocalyptic number.

It is an amenable number.

226274221 is a deficient number, since it is larger than the sum of its proper divisors (1).

226274221 is an equidigital number, since it uses as much as digits as its factorization.

226274221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 226274221 is about 15042.4140682272. The cubic root of 226274221 is about 609.3661973780.

The spelling of 226274221 in words is "two hundred twenty-six million, two hundred seventy-four thousand, two hundred twenty-one".