30138215 has 8 divisors (see below), whose sum is σ = 36197280. Its totient is φ = 24089632.

The previous prime is 30138197. The next prime is 30138217. The reversal of 30138215 is 51283103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30138215 - 2¹⁸ = 29876071 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 10308.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^30138215 is an apocalyptic number.

30138215 is a deficient number, since it is larger than the sum of its proper divisors (6059065).

30138215 is a wasteful number, since it uses less digits than its factorization.

30138215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 30138215 is about 5489.8283215416. The cubic root of 30138215 is about 311.1997042432.

The spelling of 30138215 in words is "thirty million, one hundred thirty-eight thousand, two hundred fifteen".