30000143 has 4 divisors (see below), whose sum is σ = 30508680. Its totient is φ = 29491608.

The previous prime is 30000137. The next prime is 30000149. The reversal of 30000143 is 34100003.

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 (30000137) and next prime (30000149).

It is a cyclic number.

It is not a de Polignac number, because 30000143 - 2⁶ = 30000079 is a prime.

It is a Duffinian number.

30000143 is a modest number, since divided by 143 gives 30 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000149) 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, 254180 + ... + 254297.

It is an arithmetic number, because the mean of its divisors is an integer number (7627170).

Almost surely, 2^30000143 is an apocalyptic number.

30000143 is a deficient number, since it is larger than the sum of its proper divisors (508537).

30000143 is an equidigital number, since it uses as much as digits as its factorization.

30000143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508536.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 30000143 is about 5477.2386290904. The cubic root of 30000143 is about 310.7237442993.

Adding to 30000143 its reverse (34100003), we get a palindrome (64100146).

The spelling of 30000143 in words is "thirty million, one hundred forty-three", and thus it is an aban number.