30138213 has 16 divisors (see below), whose sum is σ = 46480896. Its totient is φ = 17013360.

The previous prime is 30138197. The next prime is 30138217. The reversal of 30138213 is 31283103.

It is a happy number.

It is not a de Polignac number, because 30138213 - 2⁴ = 30138197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 30138213.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6903 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (2905056).

Almost surely, 2^30138213 is an apocalyptic number.

It is an amenable number.

30138213 is a deficient number, since it is larger than the sum of its proper divisors (16342683).

30138213 is a wasteful number, since it uses less digits than its factorization.

30138213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17384.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 30138213 is about 5489.8281393865. The cubic root of 30138213 is about 311.1996973594.

The spelling of 30138213 in words is "thirty million, one hundred thirty-eight thousand, two hundred thirteen".