30803081 has 4 divisors (see below), whose sum is σ = 31108164. Its totient is φ = 30498000.

The previous prime is 30803063. The next prime is 30803107. The reversal of 30803081 is 18030803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12390400 + 18412681 = 3520^2 + 4291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30803081 is a prime.

It is a super-2 number, since 2×30803081² = 1897659598185122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30803021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152390 + ... + 152591.

It is an arithmetic number, because the mean of its divisors is an integer number (7777041).

Almost surely, 2^30803081 is an apocalyptic number.

It is an amenable number.

30803081 is a deficient number, since it is larger than the sum of its proper divisors (305083).

30803081 is a wasteful number, since it uses less digits than its factorization.

30803081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305082.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 30803081 is about 5550.0523420955. The cubic root of 30803081 is about 313.4714931935.

Adding to 30803081 its reverse (18030803), we get a palindrome (48833884).

The spelling of 30803081 in words is "thirty million, eight hundred three thousand, eighty-one".