30345681 has 4 divisors (see below), whose sum is σ = 40460912. Its totient is φ = 20230452.

The previous prime is 30345673. The next prime is 30345701. The reversal of 30345681 is 18654303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30345681 - 2³ = 30345673 is a prime.

It is a super-2 number, since 2×30345681² = 1841720710707522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30345181) 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 3 ways as a sum of consecutive naturals, for example, 5057611 + ... + 5057616.

It is an arithmetic number, because the mean of its divisors is an integer number (10115228).

Almost surely, 2^30345681 is an apocalyptic number.

It is an amenable number.

30345681 is a deficient number, since it is larger than the sum of its proper divisors (10115231).

30345681 is a wasteful number, since it uses less digits than its factorization.

30345681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115230.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 30345681 is about 5508.6914054066. The cubic root of 30345681 is about 311.9121527005.

Adding to 30345681 its reverse (18654303), we get a palindrome (48999984).

The spelling of 30345681 in words is "thirty million, three hundred forty-five thousand, six hundred eighty-one".