30312213 has 8 divisors (see below), whose sum is σ = 41508768. Its totient is φ = 19661904.

The previous prime is 30312211. The next prime is 30312263. The reversal of 30312213 is 31221303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30312213 - 2¹ = 30312211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30312192 and 30312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136431 + ... + 136652.

It is an arithmetic number, because the mean of its divisors is an integer number (5188596).

Almost surely, 2^30312213 is an apocalyptic number.

It is an amenable number.

30312213 is a deficient number, since it is larger than the sum of its proper divisors (11196555).

30312213 is a wasteful number, since it uses less digits than its factorization.

30312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273123.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 30312213 is about 5505.6528223272. The cubic root of 30312213 is about 311.7974420766.

Adding to 30312213 its reverse (31221303), we get a palindrome (61533516).

The spelling of 30312213 in words is "thirty million, three hundred twelve thousand, two hundred thirteen".