30313220 has 24 divisors (see below), whose sum is σ = 72752064. Its totient is φ = 10393056.

The previous prime is 30313219. The next prime is 30313229. The reversal of 30313220 is 2231303.

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

It is a junction number, because it is equal to n+sod(n) for n = 30313195 and 30313204.

It is not an unprimeable number, because it can be changed into a prime (30313229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108122 + ... + 108401.

It is an arithmetic number, because the mean of its divisors is an integer number (3031336).

Almost surely, 2^30313220 is an apocalyptic number.

It is an amenable number.

30313220 is an abundant number, since it is smaller than the sum of its proper divisors (42438844).

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

30313220 is a wasteful number, since it uses less digits than its factorization.

30313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216539 (or 216537 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 30313220 is about 5505.7442730298. The cubic root of 30313220 is about 311.8008947723.

Adding to 30313220 its reverse (2231303), we get a palindrome (32544523).

The spelling of 30313220 in words is "thirty million, three hundred thirteen thousand, two hundred twenty".