30312312 has 32 divisors (see below), whose sum is σ = 77068800. Its totient is φ = 9932384.

The previous prime is 30312311. The next prime is 30312319. The reversal of 30312312 is 21321303.

It is a junction number, because it is equal to n+sod(n) for n = 30312291 and 30312300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9288 + ... + 12119.

It is an arithmetic number, because the mean of its divisors is an integer number (2408400).

Almost surely, 2^30312312 is an apocalyptic number.

It is an amenable number.

30312312 is an abundant number, since it is smaller than the sum of its proper divisors (46756488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30312312 is a wasteful number, since it uses less digits than its factorization.

30312312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21475 (or 21471 counting only the distinct ones).

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

The square root of 30312312 is about 5505.6618130793. The cubic root of 30312312 is about 311.7977815207.

Adding to 30312312 its reverse (21321303), we get a palindrome (51633615).

The spelling of 30312312 in words is "thirty million, three hundred twelve thousand, three hundred twelve".