226993381 has 2 divisors, whose sum is σ = 226993382. Its totient is φ = 226993380.

The previous prime is 226993379. The next prime is 226993421. The reversal of 226993381 is 183399622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226984356 + 9025 = 15066^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 226993381 - 2¹ = 226993379 is a prime.

It is a super-2 number, since 2×226993381² = 103051990035622322, which contains 22 as substring.

Together with 226993379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226993681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113496690 + 113496691.

It is an arithmetic number, because the mean of its divisors is an integer number (113496691).

Almost surely, 2^226993381 is an apocalyptic number.

It is an amenable number.

226993381 is a deficient number, since it is larger than the sum of its proper divisors (1).

226993381 is an equidigital number, since it uses as much as digits as its factorization.

226993381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 226993381 is about 15066.2995124881. The cubic root of 226993381 is about 610.0110909029.

The spelling of 226993381 in words is "two hundred twenty-six million, nine hundred ninety-three thousand, three hundred eighty-one".