30350681 has 4 divisors (see below), whose sum is σ = 30365412. Its totient is φ = 30335952.

The previous prime is 30350653. The next prime is 30350687. The reversal of 30350681 is 18605303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18605303 = 167 ⋅111409.

It can be written as a sum of positive squares in 2 ways, for example, as 15015625 + 15335056 = 3875^2 + 3916^2 .

It is a cyclic number.

It is not a de Polignac number, because 30350681 - 2¹⁸ = 30088537 is a prime.

It is a super-2 number, since 2×30350681² = 1842327674327522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30350681.

It is not an unprimeable number, because it can be changed into a prime (30350687) 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, 3650 + ... + 8603.

It is an arithmetic number, because the mean of its divisors is an integer number (7591353).

Almost surely, 2^30350681 is an apocalyptic number.

It is an amenable number.

30350681 is a deficient number, since it is larger than the sum of its proper divisors (14731).

30350681 is a wasteful number, since it uses less digits than its factorization.

30350681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14730.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30350681 is about 5509.1452150039. The cubic root of 30350681 is about 311.9292828166.

Adding to 30350681 its reverse (18605303), we get a palindrome (48955984).

The spelling of 30350681 in words is "thirty million, three hundred fifty thousand, six hundred eighty-one".