30031145 has 4 divisors (see below), whose sum is σ = 36037380. Its totient is φ = 24024912.

The previous prime is 30031063. The next prime is 30031201. The reversal of 30031145 is 54113003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13741849 + 16289296 = 3707^2 + 4036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30031145 is a prime.

It is a super-2 number, since 2×30031145² = 1803739340022050, which contains 22 as substring.

It is an unprimeable number.

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, 3003110 + ... + 3003119.

It is an arithmetic number, because the mean of its divisors is an integer number (9009345).

Almost surely, 2^30031145 is an apocalyptic number.

It is an amenable number.

30031145 is a deficient number, since it is larger than the sum of its proper divisors (6006235).

30031145 is an equidigital number, since it uses as much as digits as its factorization.

30031145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006234.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 30031145 is about 5480.0679740310. The cubic root of 30031145 is about 310.8307409135.

Adding to 30031145 its reverse (54113003), we get a palindrome (84144148).

The spelling of 30031145 in words is "thirty million, thirty-one thousand, one hundred forty-five".