71322012 has 48 divisors (see below), whose sum is σ = 186278400. Its totient is φ = 23598000.

The previous prime is 71322007. The next prime is 71322061. The reversal of 71322012 is 21022317.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12637 + ... + 17387.

It is an arithmetic number, because the mean of its divisors is an integer number (3880800).

Almost surely, 2^71322012 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 71322012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93139200).

71322012 is an abundant number, since it is smaller than the sum of its proper divisors (114956388).

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

71322012 is a wasteful number, since it uses less digits than its factorization.

71322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903 (or 4895 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 71322012 is about 8445.2360535393. The cubic root of 71322012 is about 414.7068370335.

Adding to 71322012 its reverse (21022317), we get a palindrome (92344329).

The spelling of 71322012 in words is "seventy-one million, three hundred twenty-two thousand, twelve".