30019143 has 16 divisors (see below), whose sum is σ = 49902336. Its totient is φ = 15594240.

The previous prime is 30019139. The next prime is 30019153. The reversal of 30019143 is 34191003.

It is not a de Polignac number, because 30019143 - 2² = 30019139 is a prime.

It is a super-2 number, since 2×30019143² = 1802297892908898, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30019103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64746 + ... + 65207.

It is an arithmetic number, because the mean of its divisors is an integer number (3118896).

Almost surely, 2^30019143 is an apocalyptic number.

30019143 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

30019143 is a deficient number, since it is larger than the sum of its proper divisors (19883193).

30019143 is a wasteful number, since it uses less digits than its factorization.

30019143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129974.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 30019143 is about 5478.9728051889. The cubic root of 30019143 is about 310.7893273782.

The spelling of 30019143 in words is "thirty million, nineteen thousand, one hundred forty-three".