72018143 has 4 divisors (see below), whose sum is σ = 72391488. Its totient is φ = 71644800.

The previous prime is 72018119. The next prime is 72018157. The reversal of 72018143 is 34181027.

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

It is a cyclic number.

It is not a de Polignac number, because 72018143 - 2¹⁴ = 72001759 is a prime.

It is a super-2 number, since 2×72018143² = 10373225842336898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72018643) 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, 186383 + ... + 186768.

It is an arithmetic number, because the mean of its divisors is an integer number (18097872).

Almost surely, 2^72018143 is an apocalyptic number.

72018143 is a deficient number, since it is larger than the sum of its proper divisors (373345).

72018143 is a wasteful number, since it uses less digits than its factorization.

72018143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373344.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 72018143 is about 8486.3503934259. The cubic root of 72018143 is about 416.0517051579.

The spelling of 72018143 in words is "seventy-two million, eighteen thousand, one hundred forty-three".