30355145 has 4 divisors (see below), whose sum is σ = 36426180. Its totient is φ = 24284112.

The previous prime is 30355123. The next prime is 30355153. The reversal of 30355145 is 54155303.

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 14776336 + 15578809 = 3844^2 + 3947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30355145 is a prime.

It is a super-3 number, since 3×30355145³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035510 + ... + 3035519.

It is an arithmetic number, because the mean of its divisors is an integer number (9106545).

Almost surely, 2^30355145 is an apocalyptic number.

It is an amenable number.

30355145 is a deficient number, since it is larger than the sum of its proper divisors (6071035).

30355145 is an equidigital number, since it uses as much as digits as its factorization.

30355145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6071034.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 30355145 is about 5509.5503446289. The cubic root of 30355145 is about 311.9445749947.

The spelling of 30355145 in words is "thirty million, three hundred fifty-five thousand, one hundred forty-five".