228138343 has 2 divisors, whose sum is σ = 228138344. Its totient is φ = 228138342.

The previous prime is 228138319. The next prime is 228138401. The reversal of 228138343 is 343831822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228138343 - 2²¹ = 226041191 is a prime.

It is a super-3 number, since 3×228138343³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228138299 and 228138308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228135343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114069171 + 114069172.

It is an arithmetic number, because the mean of its divisors is an integer number (114069172).

Almost surely, 2^228138343 is an apocalyptic number.

228138343 is a deficient number, since it is larger than the sum of its proper divisors (1).

228138343 is an equidigital number, since it uses as much as digits as its factorization.

228138343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

The square root of 228138343 is about 15104.2491703494. The cubic root of 228138343 is about 611.0350098648.

The spelling of 228138343 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, three hundred forty-three".