71231132 has 48 divisors (see below), whose sum is σ = 147087360. Its totient is φ = 29551872.

The previous prime is 71231131. The next prime is 71231141. The reversal of 71231132 is 23113217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148469 + ... + 148947.

It is an arithmetic number, because the mean of its divisors is an integer number (3064320).

Almost surely, 2^71231132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71231132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73543680).

71231132 is an abundant number, since it is smaller than the sum of its proper divisors (75856228).

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

71231132 is a wasteful number, since it uses less digits than its factorization.

71231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 648 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 71231132 is about 8439.8537902028. The cubic root of 71231132 is about 414.5306194559.

Adding to 71231132 its reverse (23113217), we get a palindrome (94344349).

The spelling of 71231132 in words is "seventy-one million, two hundred thirty-one thousand, one hundred thirty-two".