30813145 has 8 divisors (see below), whose sum is σ = 40337280. Its totient is φ = 22409520.

The previous prime is 30813137. The next prime is 30813149. The reversal of 30813145 is 54131803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30813145 - 2³ = 30813137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30813149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280065 + ... + 280174.

It is an arithmetic number, because the mean of its divisors is an integer number (5042160).

Almost surely, 2^30813145 is an apocalyptic number.

It is an amenable number.

30813145 is a deficient number, since it is larger than the sum of its proper divisors (9524135).

30813145 is a wasteful number, since it uses less digits than its factorization.

30813145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560255.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 30813145 is about 5550.9589261676. The cubic root of 30813145 is about 313.5056286705.

Adding to 30813145 its reverse (54131803), we get a palindrome (84944948).

It can be divided in two parts, 3081 and 3145, that added together give a palindrome (6226).

The spelling of 30813145 in words is "thirty million, eight hundred thirteen thousand, one hundred forty-five".