30118145 has 4 divisors (see below), whose sum is σ = 36141780. Its totient is φ = 24094512.

The previous prime is 30118093. The next prime is 30118147. The reversal of 30118145 is 54181103.

It is a Cunningham number, because it is equal to 5488²+1.

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 10837264 + 19280881 = 3292^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 30118145 - 2²⁰ = 29069569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30118145.

It is not an unprimeable number, because it can be changed into a prime (30118147) 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, 3011810 + ... + 3011819.

It is an arithmetic number, because the mean of its divisors is an integer number (9035445).

Almost surely, 2^30118145 is an apocalyptic number.

It is an amenable number.

30118145 is a deficient number, since it is larger than the sum of its proper divisors (6023635).

30118145 is an equidigital number, since it uses as much as digits as its factorization.

30118145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023634.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 30118145 is about 5488.0000911079. Note that the first 4 decimals coincide. The cubic root of 30118145 is about 311.1306096292.

Adding to 30118145 its reverse (54181103), we get a palindrome (84299248).

It can be divided in two parts, 301 and 18145, that multiplied together give a palindrome (5461645).

The spelling of 30118145 in words is "thirty million, one hundred eighteen thousand, one hundred forty-five".