30313321 has 2 divisors, whose sum is σ = 30313322. Its totient is φ = 30313320.

The previous prime is 30313313. The next prime is 30313331. The reversal of 30313321 is 12331303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 7080921 = 4820^2 + 2661^2 .

It is an emirp because it is prime and its reverse (12331303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30313321 - 2³ = 30313313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30313295 and 30313304.

It is not a weakly prime, because it can be changed into another prime (30313331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156660 + 15156661.

It is an arithmetic number, because the mean of its divisors is an integer number (15156661).

Almost surely, 2^30313321 is an apocalyptic number.

It is an amenable number.

30313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30313321 is an equidigital number, since it uses as much as digits as its factorization.

30313321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 30313321 is about 5505.7534452607. The cubic root of 30313321 is about 311.8012410663.

Adding to 30313321 its reverse (12331303), we get a palindrome (42644624).

The spelling of 30313321 in words is "thirty million, three hundred thirteen thousand, three hundred twenty-one".