303019999981 has 2 divisors, whose sum is σ = 303019999982. Its totient is φ = 303019999980.

The previous prime is 303019999907. The next prime is 303020000071. The reversal of 303019999981 is 189999910303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280360719081 + 22659280900 = 529491^2 + 150530^2 .

It is a cyclic number.

It is not a de Polignac number, because 303019999981 - 2⁷ = 303019999853 is a prime.

It is a super-2 number, since 2×303019999981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (303019999901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151509999990 + 151509999991.

It is an arithmetic number, because the mean of its divisors is an integer number (151509999991).

Almost surely, 2^303019999981 is an apocalyptic number.

It is an amenable number.

303019999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

303019999981 is an equidigital number, since it uses as much as digits as its factorization.

303019999981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 61.

The spelling of 303019999981 in words is "three hundred three billion, nineteen million, nine hundred ninety-nine thousand, nine hundred eighty-one".