30138219 has 12 divisors (see below), whose sum is σ = 43852536. Its totient is φ = 19944672.

The previous prime is 30138217. The next prime is 30138271. The reversal of 30138219 is 91283103.

It is not a de Polignac number, because 30138219 - 2¹ = 30138217 is a prime.

It is a super-2 number, since 2×30138219² = 1816624488983922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30138192 and 30138201.

It is not an unprimeable number, because it can be changed into a prime (30138217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10989 + ... + 13454.

It is an arithmetic number, because the mean of its divisors is an integer number (3654378).

Almost surely, 2^30138219 is an apocalyptic number.

30138219 is a deficient number, since it is larger than the sum of its proper divisors (13714317).

30138219 is a wasteful number, since it uses less digits than its factorization.

30138219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24586 (or 24583 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30138219 is about 5489.8286858517. The cubic root of 30138219 is about 311.1997180109.

It can be divided in two parts, 301382 and 19, that added together give a square (301401 = 549²).

The spelling of 30138219 in words is "thirty million, one hundred thirty-eight thousand, two hundred nineteen".