30550312 has 32 divisors (see below), whose sum is σ = 62092800. Its totient is φ = 14007744.

The previous prime is 30550301. The next prime is 30550349. The reversal of 30550312 is 21305503.

It is a self number, because there is not a number n which added to its sum of digits gives 30550312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16489 + ... + 18247.

It is an arithmetic number, because the mean of its divisors is an integer number (1940400).

Almost surely, 2^30550312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30550312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046400).

30550312 is an abundant number, since it is smaller than the sum of its proper divisors (31542488).

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

30550312 is a wasteful number, since it uses less digits than its factorization.

30550312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 30550312 is about 5527.2336661299. The cubic root of 30550312 is about 312.6116917018.

Adding to 30550312 its reverse (21305503), we get a palindrome (51855815).

The spelling of 30550312 in words is "thirty million, five hundred fifty thousand, three hundred twelve".