71123143 has 24 divisors (see below), whose sum is σ = 89596800. Its totient is φ = 55265184.

The previous prime is 71123123. The next prime is 71123149. The reversal of 71123143 is 34132117.

It is a de Polignac number, because none of the positive numbers 2^k-71123143 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 (71123149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69288 + ... + 70306.

It is an arithmetic number, because the mean of its divisors is an integer number (3733200).

Almost surely, 2^71123143 is an apocalyptic number.

71123143 is a deficient number, since it is larger than the sum of its proper divisors (18473657).

71123143 is a wasteful number, since it uses less digits than its factorization.

71123143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1098 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The square root of 71123143 is about 8433.4538001936. The cubic root of 71123143 is about 414.3210323155.

The spelling of 71123143 in words is "seventy-one million, one hundred twenty-three thousand, one hundred forty-three".