71231956 has 12 divisors (see below), whose sum is σ = 128025268. Its totient is φ = 34653312.

The previous prime is 71231929. The next prime is 71231959. The reversal of 71231956 is 65913217.

It can be written as a sum of positive squares in 2 ways, for example, as 57244356 + 13987600 = 7566^2 + 3740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231959) 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, 240501 + ... + 240796.

Almost surely, 2^71231956 is an apocalyptic number.

It is an amenable number.

71231956 is a deficient number, since it is larger than the sum of its proper divisors (56793312).

71231956 is a wasteful number, since it uses less digits than its factorization.

71231956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481338 (or 481336 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 71231956 is about 8439.9026060731. The cubic root of 71231956 is about 414.5322178765.

The spelling of 71231956 in words is "seventy-one million, two hundred thirty-one thousand, nine hundred fifty-six".