71322011 has 4 divisors (see below), whose sum is σ = 74422992. Its totient is φ = 68221032.

The previous prime is 71322007. The next prime is 71322061. The reversal of 71322011 is 11022317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71322011 - 2² = 71322007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71322061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550456 + ... + 1550501.

It is an arithmetic number, because the mean of its divisors is an integer number (18605748).

Almost surely, 2^71322011 is an apocalyptic number.

71322011 is a deficient number, since it is larger than the sum of its proper divisors (3100981).

71322011 is a wasteful number, since it uses less digits than its factorization.

71322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100980.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 71322011 is about 8445.2359943343. The cubic root of 71322011 is about 414.7068350953.

Adding to 71322011 its reverse (11022317), we get a palindrome (82344328).

The spelling of 71322011 in words is "seventy-one million, three hundred twenty-two thousand, eleven".