71050540 has 48 divisors (see below), whose sum is σ = 166761504. Its totient is φ = 25203200.

The previous prime is 71050523. The next prime is 71050541. The reversal of 71050540 is 4505017.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (71050541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5082 + ... + 12958.

It is an arithmetic number, because the mean of its divisors is an integer number (3474198).

Almost surely, 2^71050540 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 71050540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83380752).

71050540 is an abundant number, since it is smaller than the sum of its proper divisors (95710964).

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

71050540 is a wasteful number, since it uses less digits than its factorization.

71050540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7938 (or 7936 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 71050540 is about 8429.1482369217. The cubic root of 71050540 is about 414.1800037179.

Adding to 71050540 its reverse (4505017), we get a palindrome (75555557).

The spelling of 71050540 in words is "seventy-one million, fifty thousand, five hundred forty".