71505011 has 2 divisors, whose sum is σ = 71505012. Its totient is φ = 71505010.

The previous prime is 71504989. The next prime is 71505017. The reversal of 71505011 is 11050517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71505011 - 2⁶ = 71504947 is a prime.

It is a super-2 number, since 2×71505011² = 10225933196220242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71505017) 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 as a sum of consecutive naturals, namely, 35752505 + 35752506.

It is an arithmetic number, because the mean of its divisors is an integer number (35752506).

Almost surely, 2^71505011 is an apocalyptic number.

71505011 is a deficient number, since it is larger than the sum of its proper divisors (1).

71505011 is an equidigital number, since it uses as much as digits as its factorization.

71505011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 71505011 is about 8456.0635640941. The cubic root of 71505011 is about 415.0612209484.

Adding to 71505011 its reverse (11050517), we get a palindrome (82555528).

The spelling of 71505011 in words is "seventy-one million, five hundred five thousand, eleven".