30138143 has 4 divisors (see below), whose sum is σ = 34443600. Its totient is φ = 25832688.

The previous prime is 30138137. The next prime is 30138149. The reversal of 30138143 is 34183103.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (30138137) and next prime (30138149).

It is not a de Polignac number, because 30138143 - 2¹⁴ = 30121759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152718 + ... + 2152731.

It is an arithmetic number, because the mean of its divisors is an integer number (8610900).

Almost surely, 2^30138143 is an apocalyptic number.

30138143 is a deficient number, since it is larger than the sum of its proper divisors (4305457).

30138143 is an equidigital number, since it uses as much as digits as its factorization.

30138143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305456.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30138143 is about 5489.8217639555. The cubic root of 30138143 is about 311.1994564250.

The spelling of 30138143 in words is "thirty million, one hundred thirty-eight thousand, one hundred forty-three".