71231279 has 16 divisors (see below), whose sum is σ = 84664320. Its totient is φ = 58635360.

The previous prime is 71231267. The next prime is 71231287. The reversal of 71231279 is 97213217.

It is a de Polignac number, because none of the positive numbers 2^k-71231279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42002 + ... + 43664.

It is an arithmetic number, because the mean of its divisors is an integer number (5291520).

Almost surely, 2^71231279 is an apocalyptic number.

71231279 is a deficient number, since it is larger than the sum of its proper divisors (13433041).

71231279 is a wasteful number, since it uses less digits than its factorization.

71231279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910.

The product of its digits is 5292, while the sum is 32.

The square root of 71231279 is about 8439.8624988799. The cubic root of 71231279 is about 414.5309046119.

The spelling of 71231279 in words is "seventy-one million, two hundred thirty-one thousand, two hundred seventy-nine".