71186312 has 36 divisors (see below), whose sum is σ = 141772005. Its totient is φ = 33505056.

The previous prime is 71186309. The next prime is 71186359. The reversal of 71186312 is 21368117.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 67996516 + 3189796 = 8246^2 + 1786^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5966.

It is a super-2 number, since 2×71186312² = 10134982032322688, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 453338 + ... + 453494.

Almost surely, 2^71186312 is an apocalyptic number.

It is an amenable number.

71186312 is a deficient number, since it is larger than the sum of its proper divisors (70585693).

71186312 is a wasteful number, since it uses less digits than its factorization.

71186312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 178 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 71186312 is about 8437.1981131179. The cubic root of 71186312 is about 414.4436576645.

The spelling of 71186312 in words is "seventy-one million, one hundred eighty-six thousand, three hundred twelve".