228746641 has 2 divisors, whose sum is σ = 228746642. Its totient is φ = 228746640.

The previous prime is 228746579. The next prime is 228746659. The reversal of 228746641 is 146647822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128346241 + 100400400 = 11329^2 + 10020^2 .

It is a cyclic number.

It is not a de Polignac number, because 228746641 - 2⁷ = 228746513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228746594 and 228746603.

It is not a weakly prime, because it can be changed into another prime (228746671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114373320 + 114373321.

It is an arithmetic number, because the mean of its divisors is an integer number (114373321).

Almost surely, 2^228746641 is an apocalyptic number.

It is an amenable number.

228746641 is a deficient number, since it is larger than the sum of its proper divisors (1).

228746641 is an equidigital number, since it uses as much as digits as its factorization.

228746641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 40.

The square root of 228746641 is about 15124.3724167319. The cubic root of 228746641 is about 611.5776068175.

The spelling of 228746641 in words is "two hundred twenty-eight million, seven hundred forty-six thousand, six hundred forty-one".