228142233 has 18 divisors (see below), whose sum is σ = 362222042. Its totient is φ = 138267360.

The previous prime is 228142171. The next prime is 228142249. The reversal of 228142233 is 332241822.

228142233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 153958464 + 74183769 = 12408^2 + 8613^2 .

It is not a de Polignac number, because 228142233 - 2¹³ = 228134041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228142197 and 228142206.

It is not an unprimeable number, because it can be changed into a prime (228141233) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 103660 + ... + 105837.

Almost surely, 2^228142233 is an apocalyptic number.

It is an amenable number.

228142233 is a deficient number, since it is larger than the sum of its proper divisors (134079809).

228142233 is a wasteful number, since it uses less digits than its factorization.

228142233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209525 (or 209511 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 228142233 is about 15104.3779415109. The cubic root of 228142233 is about 611.0384827761.

The spelling of 228142233 in words is "two hundred twenty-eight million, one hundred forty-two thousand, two hundred thirty-three".