30309219 has 24 divisors (see below), whose sum is σ = 45327360. Its totient is φ = 19504368.

The previous prime is 30309211. The next prime is 30309221. The reversal of 30309219 is 91290303.

It is not a de Polignac number, because 30309219 - 2³ = 30309211 is a prime.

It is a super-2 number, since 2×30309219² = 1837297512779922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30309192 and 30309201.

It is not an unprimeable number, because it can be changed into a prime (30309211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32964 + ... + 33870.

It is an arithmetic number, because the mean of its divisors is an integer number (1888640).

Almost surely, 2^30309219 is an apocalyptic number.

30309219 is a deficient number, since it is larger than the sum of its proper divisors (15018141).

30309219 is a wasteful number, since it uses less digits than its factorization.

30309219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 30309219 is about 5505.3809132521. The cubic root of 30309219 is about 311.7871761124.

The spelling of 30309219 in words is "thirty million, three hundred nine thousand, two hundred nineteen".