30331213 has 16 divisors (see below), whose sum is σ = 35622720. Its totient is φ = 25516800.

The previous prime is 30331207. The next prime is 30331243. The reversal of 30331213 is 31213303.

It is a cyclic number.

It is not a de Polignac number, because 30331213 - 2⁹ = 30330701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30331243) 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, 10078 + ... + 12736.

It is an arithmetic number, because the mean of its divisors is an integer number (2226420).

Almost surely, 2^30331213 is an apocalyptic number.

It is an amenable number.

30331213 is a deficient number, since it is larger than the sum of its proper divisors (5291507).

30331213 is a wasteful number, since it uses less digits than its factorization.

30331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748.

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

The square root of 30331213 is about 5507.3780513054. The cubic root of 30331213 is about 311.8625743942.

Adding to 30331213 its reverse (31213303), we get a palindrome (61544516).

The spelling of 30331213 in words is "thirty million, three hundred thirty-one thousand, two hundred thirteen".