30916081 has 16 divisors (see below), whose sum is σ = 38033280. Its totient is φ = 24526080.

The previous prime is 30916073. The next prime is 30916087. The reversal of 30916081 is 18061903.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30916081 - 2³ = 30916073 is a prime.

It is a super-2 number, since 2×30916081² = 1911608128797122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30916087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5130 + ... + 9388.

It is an arithmetic number, because the mean of its divisors is an integer number (2377080).

Almost surely, 2^30916081 is an apocalyptic number.

It is an amenable number.

30916081 is a deficient number, since it is larger than the sum of its proper divisors (7117199).

30916081 is a wasteful number, since it uses less digits than its factorization.

30916081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 30916081 is about 5560.2231070345. The cubic root of 30916081 is about 313.8543450655.

Adding to 30916081 its reverse (18061903), we get a palindrome (48977984).

The spelling of 30916081 in words is "thirty million, nine hundred sixteen thousand, eighty-one".