71831011 has 12 divisors (see below), whose sum is σ = 83713392. Its totient is φ = 61455408.

The previous prime is 71831009. The next prime is 71831017. The reversal of 71831011 is 11013817.

It is not a de Polignac number, because 71831011 - 2¹ = 71831009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71831017) 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 11 ways as a sum of consecutive naturals, for example, 35421 + ... + 37393.

It is an arithmetic number, because the mean of its divisors is an integer number (6976116).

Almost surely, 2^71831011 is an apocalyptic number.

71831011 is a deficient number, since it is larger than the sum of its proper divisors (11882381).

71831011 is a wasteful number, since it uses less digits than its factorization.

71831011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 71831011 is about 8475.3177521554. The cubic root of 71831011 is about 415.6910362294.

Adding to 71831011 its reverse (11013817), we get a palindrome (82844828).

The spelling of 71831011 in words is "seventy-one million, eight hundred thirty-one thousand, eleven".