73111143 has 8 divisors (see below), whose sum is σ = 111407488. Its totient is φ = 41777784.

The previous prime is 73111141. The next prime is 73111147. The reversal of 73111143 is 34111137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73111143 - 2¹ = 73111141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 3481483 = 73111143 / (7 + 3 + 1 + 1 + 1 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73111141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740721 + ... + 1740762.

It is an arithmetic number, because the mean of its divisors is an integer number (13925936).

Almost surely, 2^73111143 is an apocalyptic number.

73111143 is a deficient number, since it is larger than the sum of its proper divisors (38296345).

73111143 is a wasteful number, since it uses less digits than its factorization.

73111143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481493.

The product of its digits is 252, while the sum is 21.

The square root of 73111143 is about 8550.5054236577. The cubic root of 73111143 is about 418.1459145050.

The spelling of 73111143 in words is "seventy-three million, one hundred eleven thousand, one hundred forty-three".