71312200 has 24 divisors (see below), whose sum is σ = 165801330. Its totient is φ = 28524800.

The previous prime is 71312191. The next prime is 71312221. The reversal of 71312200 is 221317.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 51008164 + 20304036 = 7142^2 + 4506^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178081 + ... + 178480.

Almost surely, 2^71312200 is an apocalyptic number.

It is an amenable number.

71312200 is an abundant number, since it is smaller than the sum of its proper divisors (94489130).

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

71312200 is a wasteful number, since it uses less digits than its factorization.

71312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356577 (or 356568 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 71312200 is about 8444.6551143312. The cubic root of 71312200 is about 414.6878186407.

Adding to 71312200 its reverse (221317), we get a palindrome (71533517).

The spelling of 71312200 in words is "seventy-one million, three hundred twelve thousand, two hundred".