100303081 has 2 divisors, whose sum is σ = 100303082. Its totient is φ = 100303080.

The previous prime is 100303067. The next prime is 100303117. The reversal of 100303081 is 180303001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 47610000 = 7259^2 + 6900^2 .

It is a cyclic number.

It is not a de Polignac number, because 100303081 - 2⁹ = 100302569 is a prime.

It is a super-2 number, since 2×100303081² = 20121416116185122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100303381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50151540 + 50151541.

It is an arithmetic number, because the mean of its divisors is an integer number (50151541).

Almost surely, 2^100303081 is an apocalyptic number.

It is an amenable number.

100303081 is a deficient number, since it is larger than the sum of its proper divisors (1).

100303081 is an equidigital number, since it uses as much as digits as its factorization.

100303081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 100303081 is about 10015.1425851058. The cubic root of 100303081 is about 464.6273362108.

Adding to 100303081 its reverse (180303001), we get a palindrome (280606082).

The spelling of 100303081 in words is "one hundred million, three hundred three thousand, eighty-one".