228138619 has 2 divisors, whose sum is σ = 228138620. Its totient is φ = 228138618.

The previous prime is 228138601. The next prime is 228138629. The reversal of 228138619 is 916831822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228138619 - 2¹⁷ = 228007547 is a prime.

It is a super-2 number, since 2×228138619² = 104094458958454322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228138629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114069309 + 114069310.

It is an arithmetic number, because the mean of its divisors is an integer number (114069310).

Almost surely, 2^228138619 is an apocalyptic number.

228138619 is a deficient number, since it is larger than the sum of its proper divisors (1).

228138619 is an equidigital number, since it uses as much as digits as its factorization.

228138619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 228138619 is about 15104.2583068484. The cubic root of 228138619 is about 611.0352562732.

The spelling of 228138619 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, six hundred nineteen".