228196391 has 2 divisors, whose sum is σ = 228196392. Its totient is φ = 228196390.

The previous prime is 228196387. The next prime is 228196411. The reversal of 228196391 is 193691822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228196391 - 2² = 228196387 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 (228193391) 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, 114098195 + 114098196.

It is an arithmetic number, because the mean of its divisors is an integer number (114098196).

Almost surely, 2^228196391 is an apocalyptic number.

228196391 is a deficient number, since it is larger than the sum of its proper divisors (1).

228196391 is an equidigital number, since it uses as much as digits as its factorization.

228196391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 228196391 is about 15106.1706266016. The cubic root of 228196391 is about 611.0868298146.

The spelling of 228196391 in words is "two hundred twenty-eight million, one hundred ninety-six thousand, three hundred ninety-one".