30717081 has 12 divisors (see below), whose sum is σ = 44486052. Its totient is φ = 20424096.

The previous prime is 30717047. The next prime is 30717083. The reversal of 30717081 is 18071703.

It can be written as a sum of positive squares in 2 ways, for example, as 21206025 + 9511056 = 4605^2 + 3084^2 .

It is not a de Polignac number, because 30717081 - 2¹⁰ = 30716057 is a prime.

It is a super-2 number, since 2×30717081² = 1887078130321122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30717083) 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 in 11 ways as a sum of consecutive naturals, for example, 726 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (3707171).

Almost surely, 2^30717081 is an apocalyptic number.

It is an amenable number.

30717081 is a deficient number, since it is larger than the sum of its proper divisors (13768971).

30717081 is a wasteful number, since it uses less digits than its factorization.

30717081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000 (or 8997 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 30717081 is about 5542.2992521155. The cubic root of 30717081 is about 313.1794912756.

Adding to 30717081 its reverse (18071703), we get a palindrome (48788784).

The spelling of 30717081 in words is "thirty million, seven hundred seventeen thousand, eighty-one".