71200111530 has 32 divisors (see below), whose sum is σ = 174516021504. Its totient is φ = 18582723776.

The previous prime is 71200111519. The next prime is 71200111537. The reversal of 71200111530 is 3511100217.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71200111497 and 71200111506.

It is not an unprimeable number, because it can be changed into a prime (71200111537) 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, 25246857 + ... + 25249676.

It is an arithmetic number, because the mean of its divisors is an integer number (5453625672).

Almost surely, 2^71200111530 is an apocalyptic number.

71200111530 is an abundant number, since it is smaller than the sum of its proper divisors (103315909974).

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

71200111530 is a wasteful number, since it uses less digits than its factorization.

71200111530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50496590.

The product of its (nonzero) digits is 210, while the sum is 21.

Adding to 71200111530 its reverse (3511100217), we get a palindrome (74711211747).

The spelling of 71200111530 in words is "seventy-one billion, two hundred million, one hundred eleven thousand, five hundred thirty".