2228181601 has 2 divisors, whose sum is σ = 2228181602. Its totient is φ = 2228181600.

The previous prime is 2228181577. The next prime is 2228181643. The reversal of 2228181601 is 1061818222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671174400 + 557007201 = 40880^2 + 23601^2 .

It is a cyclic number.

It is not a de Polignac number, because 2228181601 - 2⁹ = 2228181089 is a prime.

It is not a weakly prime, because it can be changed into another prime (2228181671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114090800 + 1114090801.

It is an arithmetic number, because the mean of its divisors is an integer number (1114090801).

Almost surely, 2^2228181601 is an apocalyptic number.

It is an amenable number.

2228181601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2228181601 is an equidigital number, since it uses as much as digits as its factorization.

2228181601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 2228181601 is about 47203.6185159570. The cubic root of 2228181601 is about 1306.1213481470.

Adding to 2228181601 its reverse (1061818222), we get a palindrome (3289999823).

The spelling of 2228181601 in words is "two billion, two hundred twenty-eight million, one hundred eighty-one thousand, six hundred one".