228131927 has 2 divisors, whose sum is σ = 228131928. Its totient is φ = 228131926.

The previous prime is 228131923. The next prime is 228131933. The reversal of 228131927 is 729131822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228131927 - 2² = 228131923 is a prime.

It is a super-2 number, since 2×228131927² = 104088352233466658, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228131921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114065963 + 114065964.

It is an arithmetic number, because the mean of its divisors is an integer number (114065964).

Almost surely, 2^228131927 is an apocalyptic number.

228131927 is a deficient number, since it is larger than the sum of its proper divisors (1).

228131927 is an equidigital number, since it uses as much as digits as its factorization.

228131927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 228131927 is about 15104.0367782921. The cubic root of 228131927 is about 611.0292817069.

The spelling of 228131927 in words is "two hundred twenty-eight million, one hundred thirty-one thousand, nine hundred twenty-seven".