30303213 has 24 divisors (see below), whose sum is σ = 43660224. Its totient is φ = 18659520.

The previous prime is 30303211. The next prime is 30303239. The reversal of 30303213 is 31230303.

It is not a de Polignac number, because 30303213 - 2¹ = 30303211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30303192 and 30303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30303211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66081 + ... + 66537.

It is an arithmetic number, because the mean of its divisors is an integer number (1819176).

Almost surely, 2^30303213 is an apocalyptic number.

It is an amenable number.

30303213 is a deficient number, since it is larger than the sum of its proper divisors (13357011).

30303213 is a wasteful number, since it uses less digits than its factorization.

30303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 15.

The square root of 30303213 is about 5504.8354198831. The cubic root of 30303213 is about 311.7665804263.

Adding to 30303213 its reverse (31230303), we get a palindrome (61533516).

The spelling of 30303213 in words is "thirty million, three hundred three thousand, two hundred thirteen".