30156081 has 8 divisors (see below), whose sum is σ = 40759200. Its totient is φ = 19828512.

The previous prime is 30156053. The next prime is 30156103. The reversal of 30156081 is 18065103.

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

It is not a de Polignac number, because 30156081 - 2⁷ = 30155953 is a prime.

It is a super-2 number, since 2×30156081² = 1818778442557122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30156041) 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 7 ways as a sum of consecutive naturals, for example, 68631 + ... + 69068.

It is an arithmetic number, because the mean of its divisors is an integer number (5094900).

Almost surely, 2^30156081 is an apocalyptic number.

It is an amenable number.

30156081 is a deficient number, since it is larger than the sum of its proper divisors (10603119).

30156081 is a wasteful number, since it uses less digits than its factorization.

30156081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137775.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 30156081 is about 5491.4552716015. The cubic root of 30156081 is about 311.2611853854.

The spelling of 30156081 in words is "thirty million, one hundred fifty-six thousand, eighty-one".