30705165 has 12 divisors (see below), whose sum is σ = 53222364. Its totient is φ = 16376064.

The previous prime is 30705163. The next prime is 30705211. The reversal of 30705165 is 56150703.

It can be written as a sum of positive squares in 2 ways, for example, as 12068676 + 18636489 = 3474^2 + 4317^2 .

It is not a de Polignac number, because 30705165 - 2¹ = 30705163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30705163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341124 + ... + 341213.

It is an arithmetic number, because the mean of its divisors is an integer number (4435197).

Almost surely, 2^30705165 is an apocalyptic number.

It is an amenable number.

30705165 is a deficient number, since it is larger than the sum of its proper divisors (22517199).

30705165 is a wasteful number, since it uses less digits than its factorization.

30705165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682348 (or 682345 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 30705165 is about 5541.2241427324. The cubic root of 30705165 is about 313.1389890603.

Adding to 30705165 its reverse (56150703), we get a palindrome (86855868).

The spelling of 30705165 in words is "thirty million, seven hundred five thousand, one hundred sixty-five".