71170131 has 4 divisors (see below), whose sum is σ = 94893512. Its totient is φ = 47446752.

The previous prime is 71170091. The next prime is 71170139. The reversal of 71170131 is 13107117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13107117 = 3 ⋅4369039.

It is not a de Polignac number, because 71170131 - 2⁷ = 71170003 is a prime.

It is a super-2 number, since 2×71170131² = 10130375093114322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71170098 and 71170107.

It is not an unprimeable number, because it can be changed into a prime (71170139) 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, 11861686 + ... + 11861691.

It is an arithmetic number, because the mean of its divisors is an integer number (23723378).

Almost surely, 2^71170131 is an apocalyptic number.

71170131 is a deficient number, since it is larger than the sum of its proper divisors (23723381).

71170131 is a wasteful number, since it uses less digits than its factorization.

71170131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23723380.

The product of its (nonzero) digits is 147, while the sum is 21.

The square root of 71170131 is about 8436.2391502375. The cubic root of 71170131 is about 414.4122535887.

Adding to 71170131 its reverse (13107117), we get a palindrome (84277248).

The spelling of 71170131 in words is "seventy-one million, one hundred seventy thousand, one hundred thirty-one".