30312212 has 12 divisors (see below), whose sum is σ = 60624480. Its totient is φ = 12990936.

The previous prime is 30312211. The next prime is 30312263. The reversal of 30312212 is 21221303.

It is a happy number.

30312212 is an admirable number.

It is a super-3 number, since 3×30312212³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541262 + ... + 541317.

It is an arithmetic number, because the mean of its divisors is an integer number (5052040).

Almost surely, 2^30312212 is an apocalyptic number.

It is an amenable number.

30312212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30312212 is a wasteful number, since it uses less digits than its factorization.

30312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082590 (or 1082588 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30312212 is about 5505.6527315115. The cubic root of 30312212 is about 311.7974386478.

Adding to 30312212 its reverse (21221303), we get a palindrome (51533515).

Subtracting from 30312212 its reverse (21221303), we obtain a palindrome (9090909).

The spelling of 30312212 in words is "thirty million, three hundred twelve thousand, two hundred twelve".