71317225 has 12 divisors (see below), whose sum is σ = 101066944. Its totient is φ = 48903120.

The previous prime is 71317219. The next prime is 71317247. The reversal of 71317225 is 52271317.

It is not a de Polignac number, because 71317225 - 2²⁵ = 37762793 is a prime.

It is a super-2 number, since 2×71317225² = 10172293163401250, 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 = 71317193 and 71317202.

It is an unprimeable number.

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, 203589 + ... + 203938.

Almost surely, 2^71317225 is an apocalyptic number.

It is an amenable number.

71317225 is a deficient number, since it is larger than the sum of its proper divisors (29749719).

71317225 is a wasteful number, since it uses less digits than its factorization.

71317225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407544 (or 407539 counting only the distinct ones).

The product of its digits is 2940, while the sum is 28.

The square root of 71317225 is about 8444.9526345623. The cubic root of 71317225 is about 414.6975587102.

The spelling of 71317225 in words is "seventy-one million, three hundred seventeen thousand, two hundred twenty-five".