71812182 has 64 divisors (see below), whose sum is σ = 169150464. Its totient is φ = 20113920.

The previous prime is 71812177. The next prime is 71812183. The reversal of 71812182 is 28121817.

It is a happy number.

It is a super-2 number, since 2×71812182² = 10313978967202248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71812183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40233 + ... + 41979.

It is an arithmetic number, because the mean of its divisors is an integer number (2642976).

Almost surely, 2^71812182 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71812182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84575232).

71812182 is an abundant number, since it is smaller than the sum of its proper divisors (97338282).

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

71812182 is a wasteful number, since it uses less digits than its factorization.

71812182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813.

The product of its digits is 1792, while the sum is 30.

The square root of 71812182 is about 8474.2068655420. The cubic root of 71812182 is about 415.6547114795.

Adding to 71812182 its reverse (28121817), we get a palindrome (99933999).

The spelling of 71812182 in words is "seventy-one million, eight hundred twelve thousand, one hundred eighty-two".