30380081 has 4 divisors (see below), whose sum is σ = 31427700. Its totient is φ = 29332464.

The previous prime is 30380047. The next prime is 30380083. The reversal of 30380081 is 18008303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18008303 = 31 ⋅580913.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 25090081 = 2300^2 + 5009^2 .

It is a cyclic number.

It is not a de Polignac number, because 30380081 - 2⁶ = 30380017 is a prime.

It is a super-2 number, since 2×30380081² = 1845898643133122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30380083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523766 + ... + 523823.

It is an arithmetic number, because the mean of its divisors is an integer number (7856925).

Almost surely, 2^30380081 is an apocalyptic number.

It is an amenable number.

30380081 is a deficient number, since it is larger than the sum of its proper divisors (1047619).

30380081 is a wasteful number, since it uses less digits than its factorization.

30380081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047618.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 30380081 is about 5511.8128596679. The cubic root of 30380081 is about 312.0299698638.

Adding to 30380081 its reverse (18008303), we get a palindrome (48388384).

The spelling of 30380081 in words is "thirty million, three hundred eighty thousand, eighty-one".