71231872 has 32 divisors (see below), whose sum is σ = 142375680. Its totient is φ = 35498496.

The previous prime is 71231857. The next prime is 71231873. The reversal of 71231872 is 27813217.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231873) 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, 48298 + ... + 49750.

It is an arithmetic number, because the mean of its divisors is an integer number (4449240).

Almost surely, 2^71231872 is an apocalyptic number.

It is an amenable number.

71231872 is a deficient number, since it is larger than the sum of its proper divisors (71143808).

71231872 is a wasteful number, since it uses less digits than its factorization.

71231872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1838 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 71231872 is about 8439.8976297109. The cubic root of 71231872 is about 414.5320549312.

The spelling of 71231872 in words is "seventy-one million, two hundred thirty-one thousand, eight hundred seventy-two".