228145433 has 2 divisors, whose sum is σ = 228145434. Its totient is φ = 228145432.

The previous prime is 228145409. The next prime is 228145439. The reversal of 228145433 is 334541822.

228145433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198584464 + 29560969 = 14092^2 + 5437^2 .

It is a cyclic number.

It is not a de Polignac number, because 228145433 - 2¹⁰ = 228144409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228145433.

It is not a weakly prime, because it can be changed into another prime (228145439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114072716 + 114072717.

It is an arithmetic number, because the mean of its divisors is an integer number (114072717).

Almost surely, 2^228145433 is an apocalyptic number.

It is an amenable number.

228145433 is a deficient number, since it is larger than the sum of its proper divisors (1).

228145433 is an equidigital number, since it uses as much as digits as its factorization.

228145433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 32.

The square root of 228145433 is about 15104.4838706922. The cubic root of 228145433 is about 611.0413396401.

The spelling of 228145433 in words is "two hundred twenty-eight million, one hundred forty-five thousand, four hundred thirty-three".