30851065 has 16 divisors (see below), whose sum is σ = 43344000. Its totient is φ = 20638080.

The previous prime is 30851063. The next prime is 30851069. The reversal of 30851065 is 56015803.

It is not a de Polignac number, because 30851065 - 2¹ = 30851063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30851063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9315 + ... + 12184.

It is an arithmetic number, because the mean of its divisors is an integer number (2709000).

Almost surely, 2^30851065 is an apocalyptic number.

30851065 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30851065 is a deficient number, since it is larger than the sum of its proper divisors (12492935).

30851065 is a wasteful number, since it uses less digits than its factorization.

30851065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21552.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 30851065 is about 5554.3735020252. The cubic root of 30851065 is about 313.6341805173.

Adding to 30851065 its reverse (56015803), we get a palindrome (86866868).

The spelling of 30851065 in words is "thirty million, eight hundred fifty-one thousand, sixty-five".