30081321 has 16 divisors (see below), whose sum is σ = 44651200. Its totient is φ = 20015424.

The previous prime is 30081319. The next prime is 30081341. The reversal of 30081321 is 12318003.

It is not a de Polignac number, because 30081321 - 2¹ = 30081319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30081294 and 30081303.

It is not an unprimeable number, because it can be changed into a prime (30081301) 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, 22545 + ... + 23841.

It is an arithmetic number, because the mean of its divisors is an integer number (2790700).

Almost surely, 2^30081321 is an apocalyptic number.

It is an amenable number.

30081321 is a deficient number, since it is larger than the sum of its proper divisors (14569879).

30081321 is a wasteful number, since it uses less digits than its factorization.

30081321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165 (or 2159 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 30081321 is about 5484.6441087823. The cubic root of 30081321 is about 311.0037564639.

Adding to 30081321 its reverse (12318003), we get a palindrome (42399324).

The spelling of 30081321 in words is "thirty million, eighty-one thousand, three hundred twenty-one".