71231856 has 20 divisors (see below), whose sum is σ = 184015752. Its totient is φ = 23743936.

The previous prime is 71231843. The next prime is 71231857. The reversal of 71231856 is 65813217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231857) 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, 741951 + ... + 742046.

Almost surely, 2^71231856 is an apocalyptic number.

It is an amenable number.

71231856 is an abundant number, since it is smaller than the sum of its proper divisors (112783896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71231856 is a wasteful number, since it uses less digits than its factorization.

71231856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484008 (or 1484002 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 71231856 is about 8439.8966818321. The cubic root of 71231856 is about 414.5320238940.

The spelling of 71231856 in words is "seventy-one million, two hundred thirty-one thousand, eight hundred fifty-six".