228303181 has 2 divisors, whose sum is σ = 228303182. Its totient is φ = 228303180.

The previous prime is 228303169. The next prime is 228303241. The reversal of 228303181 is 181303822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137100681 + 91202500 = 11709^2 + 9550^2 .

It is a cyclic number.

It is not a de Polignac number, because 228303181 - 2²³ = 219914573 is a prime.

It is a super-2 number, since 2×228303181² = 104244684909437522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228303121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114151590 + 114151591.

It is an arithmetic number, because the mean of its divisors is an integer number (114151591).

Almost surely, 2^228303181 is an apocalyptic number.

It is an amenable number.

228303181 is a deficient number, since it is larger than the sum of its proper divisors (1).

228303181 is an equidigital number, since it uses as much as digits as its factorization.

228303181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 228303181 is about 15109.7048614458. The cubic root of 228303181 is about 611.1821392178.

It can be divided in two parts, 228303 and 181, that added together give a square (228484 = 478²).

The spelling of 228303181 in words is "two hundred twenty-eight million, three hundred three thousand, one hundred eighty-one".