30152081 has 4 divisors (see below), whose sum is σ = 30206772. Its totient is φ = 30097392.

The previous prime is 30152063. The next prime is 30152093. The reversal of 30152081 is 18025103.

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 819025 + 29333056 = 905^2 + 5416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30152081 is a prime.

It is a super-2 number, since 2×30152081² = 1818295977261122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30152021) 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 3 ways as a sum of consecutive naturals, for example, 26510 + ... + 27623.

It is an arithmetic number, because the mean of its divisors is an integer number (7551693).

Almost surely, 2^30152081 is an apocalyptic number.

It is an amenable number.

30152081 is a deficient number, since it is larger than the sum of its proper divisors (54691).

30152081 is an equidigital number, since it uses as much as digits as its factorization.

30152081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54690.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 30152081 is about 5491.0910573401. The cubic root of 30152081 is about 311.2474225471.

Adding to 30152081 its reverse (18025103), we get a palindrome (48177184).

The spelling of 30152081 in words is "thirty million, one hundred fifty-two thousand, eighty-one".