71231232 has 72 divisors (see below), whose sum is σ = 191244816. Its totient is φ = 23535616.

The previous prime is 71231203. The next prime is 71231233. The reversal of 71231232 is 23213217.

It is a junction number, because it is equal to n+sod(n) for n = 71231199 and 71231208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104878 + ... + 105554.

It is an arithmetic number, because the mean of its divisors is an integer number (2656178).

Almost surely, 2^71231232 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 71231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95622408).

71231232 is an abundant number, since it is smaller than the sum of its proper divisors (120013584).

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

71231232 is a wasteful number, since it uses less digits than its factorization.

71231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 819 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 71231232 is about 8439.8597144739. The cubic root of 71231232 is about 414.5308134396.

Adding to 71231232 its reverse (23213217), we get a palindrome (94444449).

The spelling of 71231232 in words is "seventy-one million, two hundred thirty-one thousand, two hundred thirty-two".